{"id":40978,"date":"2025-05-30T12:27:07","date_gmt":"2025-05-30T04:27:07","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/40978.html"},"modified":"2025-05-30T12:27:07","modified_gmt":"2025-05-30T04:27:07","slug":"stl%ef%bc%9a%e4%bd%8d%e5%9b%be%e5%92%8c%e5%b8%83%e9%9a%86%e8%bf%87%e6%bb%a4%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/40978.html","title":{"rendered":"STL\uff1a\u4f4d\u56fe\u548c\u5e03\u9686\u8fc7\u6ee4\u5668"},"content":{"rendered":"

\"\"<\/h2>\n

\u4e00，\u4f4d\u56fe<\/h2>\n

1.1 \u4f4d\u56fe\u7684\u6982\u5ff5<\/h3>\n

\u00a0 \u00a0 \u00a0 \u7a76\u7adf\u4ec0\u4e48\u662f\u4f4d\u56fe\u5462？？\u6211\u4eec\u7528\u4e00\u9053\u95ee\u9898\u6765\u5f15\u5165<\/p>\n

\u95ee\u9898：\u7ed940\u4ebf\u4e2a\u4e0d\u91cd\u590d\u7684\u65e0\u7b26\u53f7\u6574\u6570，\u6ca1\u6392\u8fc7\u5e8f\u3002\u7ed9\u4e00\u4e2a\u65e0\u7b26\u53f7\u6574\u6570，\u5982\u4f55\u5feb\u901f\u5224\u65ad\u4e00\u4e2a\u6570\u662f\u5426\u5728 \u8fd940\u4ebf\u4e2a\u6570\u4e2d\u3002\u3010\u817e\u8baf\u3011<\/span><\/p>\n

\u6839\u636e\u8fd9\u4e2a\u95ee\u9898，\u6211\u4eec\u53ef\u4ee5\u7528\u4ec0\u4e48\u65b9\u6cd5\u6765\u89e3\u51b3\u5462？？？\u6211\u4eec\u53ef\u4ee5\u5f88\u8fc5\u901f\u5730\u60f3\u5230\u4e00\u4e0b\u65b9\u6cd5：<\/p>\n

\u65b9\u6cd51：\u6392\u5e8f+\u4e8c\u5206\u67e5\u627e<\/p>\n

\u65b9\u6cd52：\u5c06\u6574\u6570\u4e22\u8fdb\u54c8\u5e0c\u8868\u6216\u8005\u7ea2\u9ed1\u6811\u4e2d<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u770b\u4f3c\u597d\u50cf\u90fd\u80fd\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898，\u4f46\u662f\u6211\u4eec\u6765\u5ba1\u89c6\u4e00\u4e0b\u8fd9\u4e2a\u95ee\u9898\u7684\u5173\u952e\u2014\u2014\u5185\u5b58<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a01G=1024MB=1024*1024KB=1024*1024*1024Byte \u7ea6\u7b49\u4e8e10\u4ebfByte，\u4e5f\u5c31\u662f\u8bf440\u4ebf\u4e2a\u6570\u5927\u7ea6\u9700\u898116G\u5185\u5b58！！\u6ca1\u6709\u529e\u6cd5\u5c06\u6570\u636e\u4e00\u6b21\u6027\u653e\u5230\u5185\u5b58\u53bb\u5904\u7406\u3002<\/span><\/p>\n

\u00a0 （1）\u5206\u6790\u65b9\u6cd51：\u5982\u679c\u6211\u4eec\u5c06\u6570\u636e\u5206\u5728\u4e0d\u540c\u7684\u6587\u4ef6\u91cc，\u6211\u4eec\u53ef\u4ee5\u7528\u5f52\u5e76\u6392\u5e8f\u53bb\u5b8c\u6210\u6587\u4ef6\u4e4b\u95f4\u7684\u6392\u5e8f，\u4f46\u662f\u65e0\u6cd5\u4f7f\u7528\u4e8c\u5206\u67e5\u627e\u6cd5，<\/span>\u56e0\u4e3a\u6ca1\u6709\u529e\u6cd5\u901a\u8fc7\u4e0b\u6807\u53bb\u76f4\u63a5\u8bbf\u95ee\u5143\u7d20<\/span>！！！<\/span><\/p>\n

\u00a0 （2）\u5206\u6790\u65b9\u6cd52：\u95ee\u9898\u5c31\u662f\u6240\u9700\u8981\u7684\u5185\u5b58\u592a\u5927\u4e86，\u5149\u662f\u6570\u636e\u5c3116G\u4e86，\u66f4\u4f55\u51b5\u7ea2\u9ed1\u6811\u548c\u54c8\u5e0c\u8868\u7684\u5e95\u5c42\u7684\u5c01\u88c5\u8fd8\u9700\u8981\u4e00\u5b9a\u7684\u635f\u8017，\u6211\u4eec\u5982\u679c\u8981\u4f7f\u7528\u7684\u8bdd\u4e5f\u53ea\u80fd\u662f\u4e00\u90e8\u5206\u4e00\u90e8\u5206\u4e22\u8fdb\u5bb9\u5668，\u7136\u540e\u518d\u5220\u6389\u4e22\u4e0b\u4e00\u90e8\u5206，<\/span>\u8fd9\u6837\u4e00\u65b9\u9762\u7684\u95ee\u9898\u662f\u6211\u4eec\u5176\u5b9e\u5728\u4e00\u5f00\u59cb\u4e22\u8fdb\u5bb9\u5668\u7684\u65f6\u5019\u5c31\u53ef\u4ee5\u53bb\u505a\u6bd4\u5bf9\u4e86，\u6ca1\u6709\u5fc5\u8981\u4e22\u5230\u5bb9\u5668\u91cc，\u53e6\u4e00\u65b9\u9762\u7684\u95ee\u9898\u5c31\u662f\u4e0d\u9002\u5e94\u9700\u8981\u591a\u6b21\u67e5\u627e\u6bd4\u5bf9\u7684\u573a\u666f\u3002<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u56e0\u6b64\u4e0a\u9762\u4e24\u79cd\u65b9\u6cd5\u90fd\u662f\u4e0d\u592a\u73b0\u5b9e\u7684，\u4f46\u662f\u6709\u4e00\u79cd\u6570\u636e\u7ed3\u6784\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898，\u90a3\u5c31\u662f<\/span>\u4f4d\u56fe\u2014\u2014\u901a\u8fc7\u54c8\u5e0c\u51fd\u6570\u4e2d\u7684\u76f4\u63a5\u5b9a\u5740\u6cd5\u786e\u5b9a\u6574\u578b\u5728\u4e0d\u5728\u7684\u6a21\u578b（<\/span>\u5c31\u662f\u7528\u6bcf\u4e00\u4f4d\u6765\u5b58\u653e\u67d0\u79cd\u72b6\u6001，\u9002\u7528\u4e8e\u6d77\u91cf\u6570\u636e，\u6570\u636e\u65e0\u91cd\u590d\u7684\u573a\u666f\u3002\u901a\u5e38\u662f\u7528\u6765\u5224\u65ad\u67d0\u4e2a\u6570\u636e\u5b58\u4e0d\u5b58\u5728\u7684\u3002<\/span>）<\/span><\/p>\n

\u00a0 \u00a0<\/span>\u00a0\u6240\u4ee5\u65b9\u6cd53：\u7528\u4f4d\u56fe\u53bb\u89e3\u51b3\u00a0\u00a0<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u6570\u636e\u662f\u5426\u5728\u7ed9\u5b9a\u7684\u6574\u5f62\u6570\u636e\u4e2d，\u7ed3\u679c\u662f\u5728\u6216\u8005\u4e0d\u5728，\u521a\u597d\u662f\u4e24\u79cd\u72b6\u6001，\u90a3\u4e48\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6bd4\u7279\u4f4d\u6765\u4ee3\u8868\u6570\u636e\u662f\u5426\u5b58\u5728\u7684\u4fe1\u606f，\u5982\u679c\u4e8c\u8fdb\u5236\u6bd4\u7279\u4f4d\u4e3a1，\u4ee3\u8868\u5b58\u5728，\u4e3a0\u4ee3\u8868\u4e0d\u5b58\u5728\u3002\u6bd4\u5982：\"\"<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u4f60\u53ef\u80fd\u4f1a\u6709\u8fd9\u6837\u7684\u7591\u60d1，\u4e3a\u4ec0\u4e48\u4e0a\u9762\u7684\u6392\u5e03\u662f\u53cd\u7740\u6765\u7684，\u5373\u4ece7\u2014>1，\u4f46\u5176\u5b9e\u8fd9\u6837\u624d\u662f\u7b26\u5408\u6211\u4eec\u7684\u4eba\u4e3a\u7684\u8ba4\u77e5\u7684，\u6bd4\u59821234，\u53f3\u8fb9\u7684\u662f\u4f4e\u4f4d，\u5de6\u8fb9\u624d\u662f\u9ad8\u4f4d\u3002\u5728\u8ba1\u7b97\u673a\u4e2d\u5177\u4f53\u662f\u600e\u4e48\u6392\u5e03\u7684\u6211\u4eec\u4e0d\u5f97\u800c\u77e5，\u56e0\u4e3a\u90a3\u5c5e\u4e8e\u5185\u5b58\u5c42，\u662f\u6211\u4eec\u770b\u4e0d\u5230\u7684，\u6211\u4eec\u80fd\u770b\u5230\u7684\u53ea\u662f\u8ba1\u7b97\u673a\u7ed9\u6211\u4eec\u5c55\u73b0\u7684\u865a\u62df\u5c42，\u6bd4\u5982\u8bf4\u6211\u4eec\u7684\u76d1\u89c6\u7a97\u53e3\u548c\u5185\u5b58\u7a97\u53e3，\u6bcf\u4e2abit\u4f4d\u90fd\u662f\u5de6\u9ad8\u53f3\u4f4e\u7684\u6392\u5e03，\u7b26\u5408\u6211\u4eec\u4eba\u7684\u4e00\u4e2a\u60ef\u6027\u3002\u00a0 <\/span>\u800c\u6211\u4eec\u7684\u5de6\u79fb\u8fd0\u7b97\u7b26 \u5176\u5b9e\u5c31\u662f\u4ece\u4f4e\u4f4d->\u9ad8\u4f4d\u00a0 \u800c\u53f3\u79fb\u8fd0\u7b97\u7b26 \u5176\u5b9e\u662f\u4ece\u9ad8\u4f4d->\u4f4e\u4f4d\u3002<\/span><\/p>\n

\u00a01.2 \u4f4d\u56fe\u7684\u5b9e\u73b0<\/h3>\n

\u00a0 \u00a0 \u00a0 \u9996\u5148，\u6211\u4eec\u7684STL\u5bb9\u5668\u4e2d\u662f\u6709\u4f4d\u56fe\u8fd9\u4e2a\u5bb9\u5668\u7684，\u540d\u5b57\u53eb\u505abitset\u3002<\/p>\n

1.2.1 \u57fa\u672c\u7ed3\u6784<\/h4>\n

template<size_t N> \/\/\u975e\u7c7b\u578b\u6a21\u677f\u53c2\u6570 N\u8868\u793a\u9700\u8981\u5f00\u7684\u4f4d\u56fe\u7684\u5927\u5c0f
\nclass bitset
\n{
\npublic:<\/p>\n

private:
\nvector<char> _bits;
\n}; <\/p>\n

\u00a0 \u00a0 \u00a0 \u6211\u4eec\u9700\u8981\u53bb\u63a7\u5236\u6bd4\u7279\u4f4d，\u6240\u4ee5\u9009\u62e9char\u4f5c\u4e3a\u6211\u4eec\u7684\u7c7b\u578b\u662f\u6700\u5408\u9002\u7684，\u5176\u4e2dN\u662f\u975e\u7c7b\u578b\u6a21\u677f\u53c2\u6570，\u8868\u660e\u4f4d\u56fe\u5177\u4f53\u5f00\u591a\u5927\u3002<\/p>\n

1.2.2 \u6784\u9020\u51fd\u6570<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0\u6211\u4eec\u5177\u4f53\u5e94\u8be5\u5f00\u591a\u5927，\u81ea\u7136\u662f\u53d6\u51b3\u4e8e\u6211\u4eec\u7684\u5143\u7d20\u6570\u91cf\u7684，\u65e2\u7136\u6211\u4eec\u4e00\u4e2achar\u67098\u4e2abit\u4f4d，\u81ea\u7136\u5c31\u53ef\u4ee5\u8868\u793a8\u4e2a\u6574\u6570，\u4f46\u662f\u9700\u8981\u6ce8\u610f\u7684\u4e00\u4e2a\u539f\u5219\u662f：\u5b81\u53ef\u5f00\u591a\u4e0d\u53ef\u5f00\u5c11\u3002<\/span>\u56e0\u4e3a\u5047\u8bbe\u662f10，\u9664\u4ee58\u4e4b\u540e\u4f59\u6570\u4f1a\u88ab\u5e72\u6389，\u56e0\u6b64\u6211\u4eec<\/span>\u6700\u540e\u4e00\u5b9a\u8fd8\u8981\u52a0\u4e0a\u4e00\u4e2a1<\/span><\/p>\n

bitset()
\n{
\n_bits.resize(N \/ 8 + 1, 0); \/\/\u53ea\u80fd\u5f00\u591a\u4e0d\u80fd\u5f00\u5c11
\n} <\/p>\n

1.2.3 set<\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0set\u7684\u4f5c\u7528，\u5c31\u662f\u5c06\u67d0\u4e00\u4f4d\u8bbe\u7f6e\u62101<\/p>\n

void set(size_t x) \/\/\u8bbe\u7f6e\u62101
\n{
\nsize_t i = x \/ 8;\/\/\u8ba1\u7b97x\u6620\u5c04\u7684\u4f4dchar\u5728\u7b2ci\u4e2a\u6570\u7ec4\u7684\u4f4d\u7f6e
\nsize_t j = x % 8;\/\/\u8ba1\u7b97x\u6620\u5c04\u7684\u4f4d\u5728\u8fd9\u4e2achar\u7684\u7b2cj\u4e2a\u6bd4\u7279\u4f4d
\n\/\/\u6309\u4f4d\u6216 <<\u5de6\u79fb\u662f\u4f4e->\u9ad8
\n_bits[i] |= (1 << j);
\n} <\/p>\n

size_t i = x \/ 8;\/\/\u8ba1\u7b97x\u6620\u5c04\u7684\u4f4dchar\u5728\u7b2ci\u4e2a\u6570\u7ec4\u7684\u4f4d\u7f6e size_t j = x % 8;\/\/\u8ba1\u7b97x\u6620\u5c04\u7684\u4f4d\u5728\u8fd9\u4e2achar\u7684\u7b2cj\u4e2a\u6bd4\u7279\u4f4d<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u63a5\u4e0b\u6765\u6211\u4eec\u8981\u5224\u65ad\u7684\u95ee\u9898\u5c31\u662f，\u5982\u4f55\u5c06\u8be5\u4f4d\u8bbe\u7f6e\u4e3a1->\u5229\u7528\u4f4d\u8fd0\u7b97\u7684\u6027\u8d28 \u53ea\u8981j\u5bf9\u5e94\u7684\u4f4d\u7f6e\u6309\u4f4d\u6216\u4e0a0\u2026\u20261\u2026\u20260 （1\u5de6\u79fbj\u4f4d\u5f97\u5230）\u5373\u53ef<\/span><\/p>\n

1.2.4 reset<\/span><\/h4>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0reset\u7684\u4f5c\u7528，\u5c31\u662f\u5c06\u67d0\u4e00\u4f4d\u8bbe\u7f6e\u62100<\/p>\n

void reset(size_t x)\/\/\u8bbe\u7f6e\u62100
\n{
\nsize_t i = x \/ 8;\/\/\u8ba1\u7b97x\u6620\u5c04\u7684\u4f4dchar\u5728\u7b2ci\u4e2a\u6570\u7ec4\u7684\u4f4d\u7f6e
\nsize_t j = x % 8;\/\/\u8ba1\u7b97x\u6620\u5c04\u7684\u4f4d\u5728\u8fd9\u4e2achar\u7684\u7b2cj\u4e2a\u6bd4\u7279\u4f4d
\n\/\/\u6309\u4f4d\u4e0e
\n_bits[i] &= ~(1 << j);
\n} <\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u63a5\u4e0b\u6765\u6211\u4eec\u8981\u5224\u65ad\u7684\u95ee\u9898\u5c31\u662f，\u5982\u4f55\u5c06\u8be5\u4f4d\u8bbe\u7f6e\u4e3a0->\u5229\u7528\u4f4d\u8fd0\u7b97\u7684\u6027\u8d28 \u53ea\u8981j\u5bf9\u5e94\u7684\u4f4d\u7f6e\u6309\u4f4d\u6216\u4e0a1\u2026\u20260\u2026\u20261\u00a0（1\u5de6\u79fbj\u4f4d\u518d\u53d6\u53cd\u5f97\u5230）\u5373\u53ef<\/span><\/p>\n

1.2.5 test<\/span><\/h4>\n

\u00a0 \u00a0\u00a0<\/span>test\u7684\u4f5c\u7528，\u5c31\u662f\u5224\u65ad\u67d0\u4e00\u4f4d\u662f\u5426\u4e3a1（\u5373\u8be5\u6574\u6570\u5728\u4e0d\u5728）<\/span><\/p>\n

bool test(size_t x) \/\/x\u5728\u4e0d\u5728 \u5224\u65ad\u8fd9\u4e00\u4f4d\u662f0\u8fd8\u662f1
\n{
\nsize_t i = x \/ 8;\/\/\u8ba1\u7b97x\u6620\u5c04\u7684\u4f4dchar\u5728\u7b2ci\u4e2a\u6570\u7ec4\u7684\u4f4d\u7f6e
\nsize_t j = x % 8;\/\/\u8ba1\u7b97x\u6620\u5c04\u7684\u4f4d\u5728\u8fd9\u4e2achar\u7684\u7b2cj\u4e2a\u6bd4\u7279\u4f4d
\nreturn _bits[i] & (1 << j);
\n} <\/p>\n

\u00a0 \u00a0 \u00a0 \u8fd8\u8981\u6309\u4f4d\u4e0e\u4e0a0\u2026\u20261\u2026\u20260，\u90a3\u4e48\u9664\u4e86\u7b2cj\u4f4d \u5176\u4ed6\u4f4d\u90fd\u4f1a\u662f0 \u90a3\u4e48\u7b2cj\u4f4d\u5982\u679c\u4e5f\u662f0 \u7ed3\u679c\u5c31\u4f1a\u662f0，\u5982\u679c\u662f1 \u90a3\u4e48\u7ed3\u679c\u5c31\u662f\u975e0.<\/p>\n

1.2.6 \u4f4d\u56fe\u5f00\u6ee1\u7a7a\u95f4\u7684\u65b9\u6cd5<\/h4>\n

bitset<-1> bs;\/\/\u5f00\u6ee1\u7684\u65b9\u6cd5
\nbitset<0xFFFFFFFF> bs; <\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0-1\u5f3a\u8f6c\u6210size_t \u7c7b\u578b\u7684\u65f6\u5019\u5c31\u662f\u65e0\u7b26\u53f7\u6574\u578b\u7684\u6700\u5927\u503c，\u800c0xFFFFFFFF\u5219\u662f16\u8fdb\u5236\u4e0b\u7684\u65e0\u7b26\u53f7\u6574\u578b\u6700\u5927\u503c\u3002<\/p>\n

1.3 \u4f4d\u56fe\u7684\u5e94\u7528<\/h3>\n

1. \u5feb\u901f\u67e5\u627e\u67d0\u4e2a\u6570\u636e\u662f\u5426\u5728\u4e00\u4e2a\u96c6\u5408\u4e2d<\/p>\n

\u00a0 \u00a0 \u00a0 \u4e00\u822c\u9002\u7528\u4e8e\u6574\u578b<\/span> 2. \u6392\u5e8f + \u53bb\u91cd<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u53ef\u4ee5\u5c06\u4e00\u5806\u5143\u7d20\u90fd\u4e22\u8fdb\u4f4d\u56fe\u4e2d，\u5982\u679c\u5bf9\u5e94\u4f4d\u7f6e\u539f\u6765\u4e3a0\u7684\u8bdd，\u5c31\u53d8\u62101，\u5982\u679c\u539f\u6765\u4f4d\u7f6e\u539f\u6765\u4e3a1\u7684\u8bdd，\u5c31\u4e0d\u5904\u7406，\u7136\u540e\u6211\u4eec\u518d\u901a\u8fc7\u6620\u5c04\u5173\u7cfb\u5c06\u5143\u7d20\u8fd8\u539f\u56de\u6765，\u5c31\u5b8c\u6210\u4e86\u6392\u5e8f+\u53bb\u91cd<\/span> 3. \u6c42\u4e24\u4e2a\u96c6\u5408\u7684\u4ea4\u96c6\u3001\u5e76\u96c6\u7b49<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u8fd9\u8fb9\u6709\u4e24\u79cd\u601d\u8def：<\/span><\/p>\n

1\u3001\u5c06\u4e24\u4e2a\u96c6\u5408\u5206\u522b\u653e\u5728\u4e24\u4e2a\u4f4d\u56fe\u4e2d，\u5206\u522b\u5b8c\u6210\u6392\u5e8f\u548c\u53bb\u91cd，\u7136\u540e\u518d\u4e00\u4e2a\u4e2a\u53bb\u6bd4\u5bf9\u3002<\/span><\/p>\n

2\u3001\u5148\u5c06\u5176\u4e2d\u4e00\u4e2a\u96c6\u5408\u653e\u8fdb\u4f4d\u56fe\u4e2d，\u7136\u540e\u518d\u901a\u8fc7\u53e6\u4e00\u4e2a\u96c6\u5408\u53bb\u5224\u65ad，\u5982\u679c\u4f4d\u56fe\u4e2d\u4e3a1，\u8bf4\u660e\u8be5\u6570\u5c31\u662f\u4ea4\u96c6，<\/span>\u4f46\u662f\u4e3a\u4e86\u9632\u6b62\u96c6\u5408\u51fa\u73b0\u91cd\u590d\u6570\u5b57，\u6211\u4eec\u6b64\u65f6\u5c06\u8be5\u4f4d\u7f6e\u53d8\u62100（\u6539\u8fdb\u65b9\u6cd5）<\/span>.<\/span><\/p>\n

\u00a0 \u00a0\u00a0 \u00a0 \u4e24\u79cd\u65b9\u6cd5\u90fd\u53ef\u4ee5，\u4f46\u662f<\/span>\u7b2c\u4e00\u79cd\u65b9\u6cd5<\/span>\u6709\u4e24\u4e2a\u95ee\u9898，\u4e00\u4e2a\u662f<\/span>\u7a7a\u95f4\u7684\u6d88\u8017\u592a\u5927<\/span>，\u53e6\u4e00\u4e2a\u5c31\u662f\u65e0<\/span>\u8bba\u8fd9\u4e2a\u96c6\u5408\u591a\u5927，\u6211\u4eec\u90fd\u9700\u8981\u5c06\u6240\u6709\u7684\u4f4d\u7f6e\u90fd\u904d\u5386\u5b8c\u4e86\u624d\u53ef\u4ee5\u786e\u5b9a<\/span>，\u56e0\u4e3a\u6211\u4eec\u5e76\u4e0d\u6e05\u695a\u96c6\u5408\u91cc\u5143\u7d20\u7684\u8303\u56f4\u3002 \u800c<\/span>\u7b2c\u4e8c\u79cd\u65b9\u6cd5<\/span>\u53ef\u4ee5\u6709\u6548\u6539\u8fdb\u4e0a\u9762\u4e24\u4e2a\u95ee\u9898，\u4e0d\u4ec5<\/span>\u7a7a\u95f4\u6d88\u8017\u51cf\u5c11<\/span>，\u800c\u4e14\u6211\u4eec<\/span>\u53ea\u9700\u8981\u5224\u65ad\u96c6\u54082\u7684\u5143\u7d20\u662f\u5426\u5728\u4f4d\u56fe\u4e2d\u51fa\u73b0\u8fc7\u5373\u53ef<\/span>，\u80af\u5b9a\u6bd4\u904d\u5386\u5168\u90e8\u4f4d\u7f6e\u6548\u7387\u9ad8\u3002\u00a0 \u53e6\u4e00\u65b9\u9762\u7531\u4e8e\u96c6\u54082\u6ca1\u6709\u8fdb\u884c\u53bb\u91cd，\u6240\u4ee5\u53ef\u80fd\u4f1a\u51fa\u73b0\u91cd\u590d\u5143\u7d20，\u4f46\u662f\u901a\u8fc7\u6211\u4eec\u7684<\/span>\u6539\u8fdb\u65b9\u6cd5\u2014\u2014\u5373\u53d1\u73b0\u4ea4\u96c6\u7684\u65f6\u5019，\u5c06\u539f\u5148\u4f4d\u56fe\u7684\u4f4d\u7f6e\u53d8\u62100\u5c31\u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u3002\u00a0\u00a0<\/span><\/p>\n

\u00a0 \u00a0 \u00a0\u00a0<\/span>\u603b\u7ed3：\u5982\u679c\u6570\u636e\u91cf\u8fbe\u5230\u4ebf\u7ea7\u522b，\u53ef\u80fd\u7528\u7b2c\u4e00\u79cd\u6bd4\u8f83\u5408\u9002，\u4f46\u662f\u5927\u591a\u6570\u60c5\u51b5\u4e0b，\u7b2c\u4e8c\u79cd\u663e\u7136\u662f\u66f4\u5408\u9002\u7684！！<\/span><\/p>\n

4.\u6570\u636e\u76f8\u5bf9\u96c6\u4e2d\u65f6\u7684\u7edf\u8ba1\u6b21\u6570<\/span><\/p>\n

\u00a0 \u00a0 \u00a0<\/span>\u5047\u8bbe\u8bf4\u6211\u4eec\u5df2\u77e5\u6570\u636e\u53ea\u6709\u53ef\u80fd\u51fa\u73b0\u2018a\u2019->\u2018z\u2019 \u6b64\u65f6\u6211\u4eec\u53d1\u73b0\u4e5f\u5c3126\u79cd\u53ef\u80fd\u6027，\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u4e5f\u4e0d\u9700\u8981\u5355\u72ec\u53bb\u5c01\u88c5\u4e00\u4e2a\u4f4d\u56fe，\u76f4\u63a5\u7528\u4e00\u4e2a\u6574\u578b\u5c31\u53ef\u4ee5\u89e3\u51b3\u95ee\u9898！！<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u9644\u4e0a\u4e00\u9053\u4f4d\u56fe\u6709\u5173\u7684OJ\u9898<\/p>\n

\u9762\u8bd5\u9898 01.01. \u5224\u5b9a\u5b57\u7b26\u662f\u5426\u552f\u4e00 – \u529b\u6263（LeetCode）<\/p>\n

\"\"<\/p>\n

class Solution {
\npublic:
\n bool isUnique(string astr)
\n {
\n if(astr.size()>26) return false;\/\/\u9e3d\u5de2\u539f\u7406\u505a\u4f18\u5316
\n \/\/\u5229\u7528\u4f4d\u56fe\u7684\u601d\u60f3
\n int bitmap=0;
\n for(auto ch:astr)
\n {
\n int i=ch-'a';\/\/\u627e\u5230\u6620\u5c04\u5173\u7cfb
\n if((bitmap>>i)&1==1) return false;\/\/\u5148\u5224\u65ad\u8be5\u5b57\u7b26\u662f\u5426\u51fa\u73b0\u8fc7 \u5224\u65ad\u7b2ci\u4f4d\u662f\u5426\u662f1
\n \/\/\u5982\u679c\u6ca1\u51fa\u73b0\u8fc7，\u5c06\u7b2ci\u4f4d\u76840\u4fee\u6539\u4e3a1
\n bitmap|=(1<<i);
\n }
\n return true;
\n }
\n}; <\/p>\n

5. \u64cd\u4f5c\u7cfb\u7edf\u4e2d\u78c1\u76d8\u5757\u6807\u8bb0<\/p>\n<\/p>\n

1.4 \u4f4d\u56fe\u7684\u6d77\u91cf\u6570\u636e\u5904\u7406<\/h3>\n

1. 1\u4e2a\u6587\u4ef6\u6709100\u4ebf\u4e2aint，1G\u5185\u5b58，\u8bbe\u8ba1\u7b97\u6cd5\u627e\u5230\u51fa\u73b0\u6b21\u6570\u4e0d\u8d85\u8fc72\u6b21\u7684\u6240\u6709\u6574\u6570 \u00a0 \u00a0 \u00a0 \u8be5\u95ee\u9898\u7684\u5173\u952e\u5c31\u662f：\u6211\u4eec\u4f4d\u56fe\u6a21\u578b\u53ea\u80fd\u5224\u65ad\u6709\u6216\u8005\u65e0，\u4f46\u662f\u65e0\u6cd5\u533a\u5206\u51fa\u73b0\u591a\u5c11\u6b21\u3002\u00a0<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u8fd9\u4e2a\u65f6\u5019\u6211\u4eec\u5c31\u8981\u4ece\u672c\u8d28\u53bb\u5206\u6790，\u4e3a\u4ec0\u4e48\u4f4d\u56fe\u53ea\u80fd\u5224\u65ad\u6709\u6216\u8005\u65e0\u5462？？\u539f\u56e0\u5c31\u662f\u6211\u4eec\u53ea\u6709\u4e00\u4e2a\u6bd4\u7279\u4f4d\u6765\u8868\u793a\u72b6\u6001\u7684\u6709\u65e0，\u6240\u4ee5\u6211\u4eec\u8fd9\u4e2a\u65f6\u5019\u53ef\u4ee5\u7528\u4e24\u4e2a\u6bd4\u7279\u4f4d\u6765\u8868\u793a\u5f53\u524d\u7684\u72b6\u6001\u3002\u4f46\u662f\u6211\u4eec\u5982\u679c\u76f4\u63a5\u7528\u4e00\u4e2a\u4e3a\u4f4d\u56fe\u6765\u89e3\u51b3，\u90a3\u4e48\u8ba1\u7b97\u903b\u8f91\u4e5f\u4f1a\u968f\u4e4b\u6539\u53d8\u3002\u6240\u4ee5\u6211\u4eec\u8fd8\u662f\u7528\u4e4b\u524d\u7684\u4f4d\u56fe，\u4f46\u662f\u4e3a\u4e86\u8868\u793a\u591a\u79cd\u72b6\u6001，\u6211\u4eec\u4f7f\u7528\u4e24\u4e2a\u4f4d\u56fe\u3002 00\u8868\u793a\u65e0，01\u8868\u793a1\u6b21，11\u8868\u793a2\u6b21，10\u8868\u793a2\u6b21\u4ee5\u4e0a\u5373\u53ef\u3002<\/span><\/p>\n

\u00a0 \u00a0 \u00a0<\/span>\u6839\u636e\u4e0a\u8ff0\u7684\u5206\u6790，\u6211\u4eec\u6784\u5efa\u51fa\u89e3\u51b3\u8fd9\u4e00\u95ee\u9898\u7684\u7c7b<\/span><\/p>\n

template<size_t N> \/\/\u975e\u7c7b\u578b\u6a21\u677f\u53c2\u6570 N\u8868\u793a\u9700\u8981\u5f00\u7684\u4f4d\u56fe\u7684\u5927\u5c0f
\nclass twobitset \/\/\u89e3\u51b3100\u4ebf\u6570\u636e\u5224\u65ad\u6709\u65e0 \u627e\u5230\u6570\u636e\u4e2d\u4e0d\u8d85\u8fc72\u6b21\u7684\u6574\u6570 00-\u65e0 01\u4e00\u4e2a 11\u4e24\u4e2a 10\u4e24\u4e2a\u4ee5\u4e0a
\n{
\npublic:
\nvoid set(size_t x) \/\/\u8bbe\u7f6e\u62101
\n{
\nif (_bit1.test(x) == false && _bit2.test(x) == false) _bit2.set(x);\/\/00->01
\nelse if (_bit1.test(x) == false && _bit2.test(x) == true) _bit1.set(x);\/\/01->11
\nelse if (_bit1.test(x) == true && _bit2.test(x) == true) _bit2.reset(x);\/\/11->10
\n\/\/\u5982\u679c\u662f11 \u4e0d\u5904\u7406
\n}<\/p>\n

void Print() \/\/\u6253\u5370\u53ea\u51fa\u73b0\u4e00\u6b21\u6216\u8005\u4e24\u6b21\u7684\u6574\u6570
\n{
\nfor (size_t i = 0; i < N; ++i)
\nif (_bit2.test(i) == true)
\ncout << i << endl;
\ncout << endl;
\n}
\nprivate:
\nbitset<N> _bit1;
\nbitset<N> _bit2;<\/p>\n

}; <\/p>\n

2\u3001\u7ed9\u4e24\u4e2a\u6587\u4ef6，\u5206\u522b\u6709100\u4ebf\u4e2a\u6574\u6570，\u6211\u4eec\u53ea\u67091G\u5185\u5b58，\u5982\u4f55\u627e\u5230\u4e24\u4e2a\u6587\u4ef6\u4ea4\u96c6？<\/p>\n

\u00a0 \u00a0 \u89e3\u51b3\u65b9\u6848\u6211\u57281.3\u4e2d\u5df2\u7ecf\u8bb2\u8fc7\u4e86！！<\/p>\n

1.5 \u4f4d\u56fe\u7684\u4f18\u7f3a\u70b9<\/h3>\n

\u4f18\u70b9：\u901f\u5ea6\u5feb\u3001\u8282\u7701\u5185\u5b58<\/p>\n

\u7f3a\u70b9：\u53ea\u80fd\u6620\u5c04\u6574\u578b，\u5982\u6d6e\u70b9\u6570\u3001string\u7b49\u7b49\u4e0d\u80fd\u5b58\u50a8\u6620\u5c04\u00a0\u00a0<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u9996\u5148\u6211\u4eec\u8981\u601d\u8003，\u4e3a\u4ec0\u4e48\u4f4d\u56fe\u65e0\u6cd5\u5b58\u50a8\u8fd9\u4e24\u79cd\u7c7b\u578b\u7684\u6620\u5c04，\u539f\u56e0\u5c31\u5728\u4e8e\u5176\u53ef\u4ee5\u8868\u73b0\u7684\u5f62\u5f0f\u592a\u591a\u79cd\u4e86，\u6bd4\u5982\u8bf4\u5bf9\u4e8e\u65e0\u7b26\u53f7\u6574\u578b\u6765\u8bf4，\u6700\u591a\u4e5f\u5c312^32-1\u79cd\u53ef\u80fd， \u4f46\u662f\u5bf9\u4e8e\u6d6e\u70b9\u6570\u548cstring\u6765\u8bf4，\u5176\u7ec4\u5408\u4e4b\u591a\u5bfc\u81f4\u65e0\u6cd5\u50cf\u6574\u578b\u4e00\u6837\u5728\u4f4d\u56fe\u4e2d\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u76f4\u63a5\u5b9a\u5740\u6cd5\u3002<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u6d6e\u70b9\u6570\u8fd8\u597d，\u4f46\u662fstring\u5e73\u65f6\u975e\u5e38\u5e38\u7528，\u6bd4\u5982\u7528\u6237\u540d，\u6240\u4ee5\u8fd9\u4e2a\u65f6\u5019\u5f53\u6570\u636e\u91cf\u6781\u5927\u7684\u65f6\u5019，\u4e5f\u662f\u4e00\u4e2a\u95ee\u9898，\u6240\u4ee5\u540e\u6765\u51fa\u73b0\u4e86\u4e00\u79cd\u7ed3\u6784\u89e3\u51b3\u4e86\u8fd9\u79cd\u95ee\u9898\u2014\u2014>\u5e03\u9686\u8fc7\u6ee4\u5668<\/span><\/p>\n

\u4e8c\u3001\u5e03\u9686\u8fc7\u6ee4\u5668<\/h2>\n

2.1 \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u63d0\u51fa<\/h3>\n

\u00a0 \u00a0 \u00a0 \u6211\u4eec\u5728\u4f7f\u7528\u65b0\u95fb\u5ba2\u6237\u7aef\u770b\u65b0\u95fb\u65f6，\u5b83\u4f1a\u7ed9\u6211\u4eec\u4e0d\u505c\u5730\u63a8\u8350\u65b0\u7684\u5185\u5bb9，\u5b83\u6bcf\u6b21\u63a8\u8350\u65f6\u8981\u53bb\u91cd，\u53bb\u6389\u90a3\u4e9b\u5df2\u7ecf\u770b\u8fc7\u7684\u5185\u5bb9\u3002\u95ee\u9898\u6765\u4e86，\u65b0\u95fb\u5ba2\u6237\u7aef\u63a8\u8350\u7cfb\u7edf\u5982\u4f55\u5b9e\u73b0\u63a8\u9001\u53bb\u91cd\u7684？ \u7528\u670d\u52a1\u5668\u8bb0\u5f55\u4e86\u7528\u6237\u770b\u8fc7\u7684\u6240\u6709\u5386\u53f2\u8bb0\u5f55，\u5f53\u63a8\u8350\u7cfb\u7edf\u63a8\u8350\u65b0\u95fb\u65f6\u4f1a\u4ece\u6bcf\u4e2a\u7528\u6237\u7684\u5386\u53f2\u8bb0\u5f55\u91cc\u8fdb\u884c\u7b5b\u9009，\u8fc7\u6ee4\u6389\u90a3 \u4e9b\u5df2\u7ecf\u5b58\u5728\u7684\u8bb0\u5f55<\/span>\u3002 \u5982\u4f55\u5feb\u901f\u67e5\u627e\u5462？ \u00a0<\/p>\n

1. \u7528\u54c8\u5e0c\u8868\u5b58\u50a8\u7528\u6237\u8bb0\u5f55，\u7f3a\u70b9：\u6d6a\u8d39\u7a7a\u95f4<\/span> 2. \u7528\u4f4d\u56fe\u5b58\u50a8\u7528\u6237\u8bb0\u5f55，\u7f3a\u70b9：\u4f4d\u56fe\u4e00\u822c\u53ea\u80fd\u5904\u7406\u6574\u5f62，\u5982\u679c\u5185\u5bb9\u7f16\u53f7\u662f\u5b57\u7b26\u4e32，\u5c31\u65e0\u6cd5\u5904\u7406 \u4e86\u3002<\/span> 3. \u5c06\u54c8\u5e0c\u4e0e\u4f4d\u56fe\u7ed3\u5408，\u5373\u5e03\u9686\u8fc7\u6ee4\u5668<\/span> \u00a0<\/p>\n

2.2 \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u6982\u5ff5<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5e03\u9686\u8fc7\u6ee4\u5668\u662f\u7531\u5e03\u9686（Burton Howard Bloom）\u57281970\u5e74\u63d0\u51fa\u7684 \u4e00\u79cd\u7d27\u51d1\u578b\u7684\u3001\u6bd4\u8f83\u5de7\u5999\u7684\u6982\u7387\u578b\u6570\u636e\u7ed3\u6784<\/span>，\u7279\u70b9\u662f\u9ad8\u6548\u5730\u63d2\u5165\u548c\u67e5\u8be2，\u53ef\u4ee5\u7528\u6765\u544a\u8bc9\u4f60 \u201c\u67d0\u6837\u4e1c\u897f\u4e00\u5b9a\u4e0d\u5b58\u5728\u6216\u8005\u53ef\u80fd\u5b58 \u5728\u201d，\u5b83\u662f\u7528\u591a\u4e2a\u54c8\u5e0c\u51fd\u6570，\u5c06\u4e00\u4e2a\u6570\u636e\u6620\u5c04\u5230\u4f4d\u56fe\u7ed3\u6784\u4e2d\u3002\u6b64\u79cd\u65b9\u5f0f\u4e0d\u4ec5\u53ef\u4ee5\u63d0\u5347\u67e5\u8be2\u6548\u7387，\u4e5f \u53ef\u4ee5\u8282\u7701\u5927\u91cf\u7684\u5185\u5b58\u7a7a\u95f4\u3002<\/p>\n

\"\"<\/p>\n

\u00a0 \u00a0\u00a0\u600e\u4e48\u53bb\u7406\u89e3\u6982\u7387\u578b\u6570\u636e\u7ed3\u6784\u5462？？<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u00a0\u9996\u5148\u53ef\u4ee5\u786e\u5b9a\u7684\u662f，\u7531\u4e8e\u5b57\u7b26\u4e32\u7684\u6392\u5217\u7ec4\u5408\u79cd\u7c7b\u975e\u5e38\u591a，\u6240\u4ee5\u6211\u4eec\u65e0\u8bba\u5982\u4f55\u90fd\u65e0\u6cd5\u505a\u5230\u901a\u8fc7\u76f4\u63a5\u5b9a\u5740\u6cd5\u8ba9\u6bcf\u4e2a\u5b57\u7b26\u4e32\u6b63\u597d\u90fd\u5bf9\u5e94\u4e00\u4e2a\u4f4d\u7f6e\u2026\u2026\u4e5f\u5c31\u662f\u8bf4，\u6211\u4eec<\/span>\u5229\u7528\u5b57\u7b26\u4e32\u54c8\u5e0c\u51fd\u6570\u5728\u4f4d\u56fe\u4e2d\u5b58\u50a8\u5927\u91cf\u5b57\u7b26\u4e32\u4fe1\u606f\u662f\u5fc5\u7136\u4f1a\u9020\u6210\u54c8\u5e0c\u51b2\u7a81\u7684<\/span>，\u800c\u5e03\u9686\u5927\u4f6c\u7684\u60f3\u6cd5\u5e76\u4e0d\u662f\u5b8c\u5168\u89e3\u51b3\u54c8\u5e0c\u51b2\u7a81，\u800c\u662f\u60f3\u964d\u4f4e\u54c8\u5e0c\u51b2\u7a81\u7684\u6982\u7387\u3002\u00a0 \u7b56\u7565\u5c31\u662f：<\/span>\u65e2\u7136\u4e00\u4e2a\u5b57\u7b26\u4e32\u6620\u5c04\u4e00\u4e2a\u4f4d\u7f6e\u5bb9\u6613\u51fa\u73b0\u54c8\u5e0c\u51b2\u7a81，\u90a3\u4e48\u4e00\u4e2a\u5b57\u7b26\u4e32\u6620\u5c04\u591a\u4e2a\u4f4d\u7f6e\u51fa\u73b0\u54c8\u5e0c\u51b2\u7a81\u7684\u6982\u7387\u5c31\u4f1a\u964d\u4f4e<\/span>！！！\u8fd9\u662f\u4e00\u79cd\u9000\u800c\u6c42\u5176\u6b21\u7684\u7b56\u7565\u3002<\/span><\/p>\n<\/p>\n

\u6240\u4ee5\u6211\u4eec\u8981\u4f7f\u7528\u591a\u4e2a\u7c7b\u578b\u7684\u5b57\u7b26\u4e32\u54c8\u5e0c\u51fd\u6570\u6765\u5e2e\u52a9\u6211\u4eec\u8ba9\u4e00\u4e2a\u5b57\u7b26\u4e32\u6620\u5c04\u591a\u4e2a\u4f4d\u7f6e\u3002<\/span>\u5177\u4f53\u6709\u54ea\u4e9b\u5e38\u7528\u7684\u54c8\u5e0c\u51fd\u6570\u53ef\u4ee5\u53c2\u7167\u4e0b\u9762\u7684\u6587\u7ae0：\u5b57\u7b26\u4e32\u54c8\u5e0c\u51fd\u6570\u7b97\u6cd5<\/p>\n

\"\"<\/p>\n

\u901a\u8fc7\u4e0a\u56fe，\u6211\u4eec\u53ef\u4ee5\u786e\u5b9a\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u4e24\u4e2a\u7279\u70b9：<\/p>\n

1\u3001\u4e0d\u5728\u662f\u51c6\u786e\u7684<\/span>，\u56e0\u4e3a\u53ea\u8981\u6709\u4e00\u4e2a\u4f4d\u7f6e\u6ca1\u6620\u5c04\u4e0a，\u5c31\u662f\u4e0d\u5728\u3002<\/p>\n

2\u3001\u5728\u662f\u4e0d\u51c6\u5907\u7684，\u5b58\u5728\u8bef\u5224<\/span>，\u56e0\u4e3a\u53ef\u80fd\u8be5\u5b57\u7b26\u4e32\u6620\u5c04\u7684\u4f4d\u7f6e\u6070\u597d\u88ab\u524d\u9762\u7684\u5b57\u7b26\u4e32\u7ed9\u6620\u5c04\u4e86<\/p>\n

2.3 \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u5e94\u7528\u573a\u666f<\/h3>\n

\u00a0\u65e2\u7136\u5e03\u9686\u8fc7\u6ee4\u5668\u53ea\u662f\u964d\u4f4e\u54c8\u5e0c\u51b2\u7a81\u800c\u4e0d\u662f\u907f\u514d\u54c8\u5e0c\u51b2\u7a81，\u90a3\u4e48\u4ed6\u9002\u5408\u7684\u573a\u666f\u5982\u4e0b：<\/p>\n

1\u3001\u80fd\u5bb9\u5fcd\u8bef\u5224\u7684\u573a\u666f（\u5ba2\u6237\u7aef\u611f\u77e5\u4e0d\u5230）<\/span><\/p>\n

\u6bd4\u5982\u6ce8\u518c\u65f6，\u5feb\u901f\u5224\u65ad\u6635\u79f0\u662f\u5426\u88ab\u4f7f\u7528\u8fc7\u3002<\/p>\n

\"\"<\/p>\n

2\u3001\u867d\u7136\u4e0d\u80fd\u5bb9\u5fcd\u8bef\u5224，\u4f46\u662f\u53ef\u4ee5\u786e\u5b9a\u4e0d\u5728\u662f\u51c6\u786e\u7684，\u53ea\u9700\u8981\u5bf9\u5728\u7684\u573a\u666f\u8fdb\u884c\u7279\u6b8a\u5904\u7406<\/span><\/p>\n

\u6bd4\u5982\u8bf4\u6ce8\u518c\u65f6，\u5feb\u901f\u5224\u65ad\u8be5\u7535\u8bdd\u53f7\u7801\u662f\u5426\u88ab\u6ce8\u518c\u8fc7\u3002<\/p>\n

\"\"<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u901a\u8fc7\u4e0a\u56fe\u6211\u4eec\u53ef\u4ee5\u53d1\u73b0，\u5e03\u9686\u8fc7\u6ee4\u5668\u81f3\u5c11\u5bf9\u4e0d\u5728\u7684\u573a\u666f\u662f\u5224\u65ad\u51c6\u786e\u7684，\u6240\u4ee5\u6211\u4eec\u53ef\u4ee5\u4e0d\u9700\u8981\u53bb\u6570\u636e\u5e93\u67e5\u8be2，\u53ea\u9700\u8981\u5bf9\u5728\u7684\u7ed3\u679c\u8fdb\u884c\u67e5\u8be2\u548c\u6bd4\u5bf9\u5373\u53ef<\/span>\u3002<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u540c\u65f6\u5927\u5bb6\u4f1a\u53d1\u73b0，\u4e0a\u56fe\u5c31\u5145\u5206\u5c55\u73b0\u4e86\u4e3a\u4ec0\u4e48\u8be5\u89e3\u51b3\u5c31\u53eb\u505a\u5e03\u9686\u8fc7\u6ee4\u5668，\u5176\u5b9e\u5c31\u662f\u5c06\u5927\u91cf\u7684\u4fe1\u606f\u8fdb\u884c\u8fc7\u6ee4，\u5904\u7406\u5176\u4e2d\u53ef\u4ee5\u89e3\u51b3\u7684\u95ee\u9898，\u5bf9\u4e8e\u5c11\u90e8\u5206\u4e0d\u80fd\u89e3\u51b3\u7684\u95ee\u9898，\u518d\u5230\u6570\u636e\u5e93\u4e2d\u53bb\u89e3\u51b3\u3002<\/span><\/p>\n

2.4 \u5e03\u9686\u8fc7\u6ee4\u5668\u5b9e\u73b0\u7684\u57fa\u672c\u7ed3\u6784<\/span><\/h3>\n

\/\/\u60f3\u628a\u7c7b\u5f53\u51fd\u6570\u4f7f\u7528 \u5c31\u8981\u60f3\u5230\u4eff\u51fd\u6570
\n \/\/\u63d0\u4f9b\u4e09\u4e2a\u5b57\u7b26\u4e32\u54c8\u5e0c\u51fd\u6570
\nstruct BKDRHash
\n{
\nsize_t operator() (const string& s) \/\/\u5b57\u7b26\u4e32\u8f6c\u6574\u578b
\n{
\nsize_t hash = 0;
\nfor (auto e : s)
\n{
\nhash += e;
\nhash *= 31;
\n}
\nreturn hash;
\n}
\n};
\nstruct APHash
\n{
\nsize_t operator()(const string& s)
\n{
\nsize_t hash = 0;
\nfor (long i = 0; i < s.size(); i++)
\n{
\nsize_t ch = s[i];
\nif ((i & 1) == 0) hash ^= ((hash << 7) ^ ch ^ (hash >> 3));
\nelse hash ^= (~((hash << 11) ^ ch ^ (hash >> 5)));
\n}
\nreturn hash;
\n}
\n};
\nstruct DJBHash
\n{
\nsize_t operator()(const string& s)
\n{
\nsize_t hash = 5381;
\nfor (auto ch : s) hash += (hash << 5) + ch;
\nreturn hash;
\n}
\n};
\n\/\/\u5e03\u9686\u8fc7\u6ee4\u5668 \u57fa\u672c\u4e0a\u89e3\u51b3\u7684\u662f\u5b57\u7b26\u4e32\u7684\u95ee\u9898 \u5982\u679c\u662f\u6574\u578b\u7684\u8bdd \u8fd8\u662f\u4f4d\u56fe\u66f4\u597d\u7528 \u81f3\u4e8e\u7528\u591a\u5c11\u4e2a\u54c8\u5e0c\u51fd\u6570 \u53d6\u51b3\u4e8e\u5b9e\u9645\u7684\u9700\u6c42
\n\/\/N\u8868\u793a\u6700\u591a\u4f1a\u63d2\u5165key\u7684\u4e2a\u6570
\ntemplate<size_t N,
\nsize_t X=6,
\nclass K=string,
\nclass Hash1= BKDRHash,
\nclass Hash2= APHash,
\nclass Hash3= DJBHash> \/\/K\u5e76\u4e0d\u786e\u5b9a\u662f\u4ec0\u4e48 \u901a\u8fc7\u591a\u79cdHash\u51fd\u6570\u53bb\u5e2e\u52a9\u6211\u4eec\u6620\u5c04\u4e0d\u540c\u7684\u4f4d\u7f6e
\nclass BloomFilter
\n{
\npublic:<\/p>\n

private:
\nbitset<N*X> _bits;
\n};<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u6211\u4eec\u4e00\u5171\u7528\u4e866\u4e2a\u6a21\u7248\u53c2\u6570，\u9996\u5148\u5e03\u9686\u8fc7\u6ee4\u5668\u5927\u90e8\u5206\u60c5\u51b5\u4e0b\u662f\u7528\u6765\u89e3\u51b3\u5b57\u7b26\u4e32\u7684\u95ee\u9898，\u6240\u4ee5\u6211\u4eec\u7684K\u9ed8\u7136\u7ed9\u7684\u662fstring，\u800c\u540e\u9762Hash1\u2014\u2014Hash3\u90fd\u662f\u5b57\u7b26\u4e32\u54c8\u5e0c\u51fd\u6570，\u8fd9\u6837\u4e00\u4e2a\u5b57\u7b26\u4e32\u53ef\u4ee5\u6620\u5c04\u4e09\u4e2a\u4f4d\u7f6e\u3002\u800cN\u8868\u793a\u7684\u662f\u8981\u63d2\u5165\u591a\u5c11\u4e2a\u5b57\u7b26\u4e32，\u800c\u5173\u4e8eX\u662f\u4ec0\u4e48，\u6211\u4eec\u6765\u770b\u770b\u4e0b\u9762\u8fd9\u4e2a\u6587\u7ae0\u3002<\/p>\n

\u8be6\u89e3\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u539f\u7406，\u4f7f\u7528\u573a\u666f\u548c\u6ce8\u610f\u4e8b\u9879 – \u77e5\u4e4e<\/p>\n

\"\"<\/p>\n

\u00a0\u6240\u4ee5X\u5728\u8fd9\u8fb9\u53ef\u4ee5\u7406\u89e3\u4e3a\u6211\u4eec\u9700\u8981\u591a\u5f00X\u500d\u7684\u7a7a\u95f4，\u6765\u5c3d\u53ef\u80fd\u8fbe\u5230\u8bef\u5224\u7387\u548c\u6548\u7387\u5c3d\u53ef\u80fd\u5408\u7406\u3002<\/p>\n

\u7ecf\u8fc7\u8ba1\u7b97\u540e\u5982\u679c\u6211\u4eec\u7684\u54c8\u5e0c\u51fd\u6570\u662f3\u4e2a\u7684\u8bdd，\u5927\u6982\u9700\u8981\u591a\u5f004.3\u500d\u7684\u7a7a\u95f4\u6bd4\u8f83\u5408\u7406\u3002<\/p>\n

2.5 \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u63d2\u5165<\/h3>\n

void set(const K& key)
\n{
\nsize_t len = N * X;
\nsize_t hash1 = Hash1()(key) % len;
\n_bits.set(hash1);
\nsize_t hash2 = Hash2()(key) % len;
\n_bits.set(hash2);
\nsize_t hash3 = Hash3()(key) % len;
\n_bits.set(hash3);
\n\/\/cout << hash1 << " " << hash2 << " " << hash3 << endl << endl; \/\/\u770b\u770b\u6620\u5c04\u7684\u4f4d\u7f6e
\n} <\/p>\n

\u00a02.6 \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u67e5\u627e<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u601d\u60f3\u662f\u5c06\u4e00\u4e2a\u5143\u7d20\u7528\u591a\u4e2a\u54c8\u5e0c\u51fd\u6570\u6620\u5c04\u5230\u4e00\u4e2a\u4f4d\u56fe\u4e2d，\u56e0\u6b64\u88ab\u6620\u5c04\u5230\u7684\u4f4d\u7f6e\u7684\u6bd4\u7279\u4f4d\u4e00\u5b9a\u4e3a1\u3002\u6240\u4ee5\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u65b9\u5f0f\u8fdb\u884c\u67e5\u627e：\u5206\u522b\u8ba1\u7b97\u6bcf\u4e2a\u54c8\u5e0c\u503c\u5bf9\u5e94\u7684\u6bd4\u7279\u4f4d\u7f6e\u5b58\u50a8\u7684\u662f\u5426\u4e3a\u96f6，\u53ea\u8981\u6709\u4e00\u4e2a\u4e3a\u96f6，\u4ee3\u8868\u8be5\u5143\u7d20\u4e00\u5b9a\u4e0d\u5728\u54c8\u5e0c\u8868\u4e2d，\u5426\u5219\u53ef\u80fd\u5728\u54c8\u5e0c\u8868\u4e2d\u3002<\/span><\/p>\n

bool test(const K& key)
\n{
\nsize_t len = N * X;
\nsize_t hash1 = Hash1()(key) % len;
\nif (_bits.test(hash1) == false) return false;
\nsize_t hash2 = Hash2()(key) % len;
\nif (_bits.test(hash2) == false) return false;
\nsize_t hash3 = Hash3()(key) % len;
\nif (_bits.test(hash3) == false) return false;<\/p>\n

return true;\/\/\u5728\u53ef\u80fd\u4f1a\u6709\u8bef\u5224
\n} <\/p>\n

\u6ce8\u610f：\u5e03\u9686\u8fc7\u6ee4\u5668\u5982\u679c\u8bf4\u67d0\u4e2a\u5143\u7d20\u4e0d\u5b58\u5728\u65f6，\u8be5\u5143\u7d20\u4e00\u5b9a\u4e0d\u5b58\u5728，\u5982\u679c\u8be5\u5143\u7d20\u5b58\u5728\u65f6，\u8be5\u5143\u7d20\u53ef \u80fd\u5b58\u5728，\u56e0\u4e3a\u6709\u4e9b\u54c8\u5e0c\u51fd\u6570\u5b58\u5728\u4e00\u5b9a\u7684\u8bef\u5224\u3002<\/span><\/p>\n

2.7 \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u5220\u9664<\/span><\/h3>\n

\u00a0 \u00a0 \u00a0 \u9996\u5148\u6211\u4eec\u53ef\u4ee5\u786e\u5b9a\u7684\u662f，\u5e03\u9686\u8fc7\u6ee4\u5668\u662f\u4e0d\u592a\u652f\u6301\u5220\u9664\u7684，\u56e0\u4e3a\u6211\u4eec\u5220\u4e86\u4e00\u4e2a\u4f4d\u7f6e，\u53ef\u80fd\u4f1a\u5f71\u54cd\u5176\u4ed6\u4f4d\u7f6e\u3002<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u4e00\u79cd\u652f\u6301\u5220\u9664\u7684\u65b9\u6cd5：\u5c06\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d\u7684\u6bcf\u4e2a\u6bd4\u7279\u4f4d\u6269\u5c55\u6210\u4e00\u4e2a\u5c0f\u7684\u8ba1\u6570\u5668，\u63d2\u5165\u5143\u7d20\u65f6\u7ed9k\u4e2a\u8ba1\u6570\u5668(k\u4e2a\u54c8\u5e0c\u51fd\u6570\u8ba1\u7b97\u51fa\u7684\u54c8\u5e0c\u5730\u5740)\u52a0\u4e00，\u5220\u9664\u5143\u7d20\u65f6，\u7ed9k\u4e2a\u8ba1\u6570\u5668\u51cf\u4e00，\u901a\u8fc7\u591a\u5360\u7528\u51e0\u500d\u5b58\u50a8\u7a7a\u95f4\u7684\u4ee3\u4ef7\u6765\u589e\u52a0\u5220\u9664\u64cd\u4f5c\u3002<\/span><\/p>\n

\u00a0 \u00a0 \u00a0<\/span> \u00a0 \u00a0 \u00a0 \u4f46\u662f\u8fd9\u6837\u4f1a\u5b58\u5728\u4e09\u79cd\u7f3a\u9677：<\/p>\n

1\u3001\u65e0\u6cd5\u786e\u8ba4\u5143\u7d20\u662f\u5426\u771f\u6b63\u5728\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u56e0\u4e3a\u65e0\u8bba\u662f\u4f4d\u56fe\u8fd8\u662f\u5e03\u9686\u8fc7\u6ee4\u5668\u5e76\u4e0d\u662f\u4f20\u7edf\u610f\u4e49\u4e0a\u7684\u771f\u7684\u5b58\u4e86\u76f8\u5bf9\u5e94\u7684\u5143\u7d20\u5728\u91cc\u9762，\u800c\u53ea\u80fd\u53cd \u5e94\u5177\u4f53\u5728\u4e0d\u5728\u3002\u6240\u4ee5\u6211\u4eec\u5f88\u96be\u4fdd\u8bc1\u8bf4\u6211\u4eec\u5f53\u524d\u8981\u5220\u9664\u7684\u5143\u7d20\u662f\u5426\u5b58\u5728\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d，\u5982\u679c\u8981\u5220\u9664\u7684\u5143\u7d20\u4e0d\u5b58\u5728\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d，\u5e03\u9686\u8fc7\u6ee4\u5668\u662f\u68c0\u6d4b\u4e0d\u51fa\u6765\u7684，\u8fd9\u6837\u5c31\u6574\u4e2a\u4e71\u5957\u4e86\u3002<\/p>\n

2\u3001\u5bb9\u6613\u5b58\u5728\u8ba1\u6570\u56de\u7ed5<\/p>\n

\u00a0 \u00a0 \u00a0 \u65e2\u7136\u662f\u8ba1\u6570，\u90a3\u4e48\u6211\u4eec\u5c31\u53ef\u4ee5\u6839\u636e\u60c5\u51b5\u53bb\u63a7\u5236\u4e00\u4e2a\u4f4d\u7f6e\u5927\u7ea6\u7528\u51e0\u4e2a\u6bd4\u7279\u4f4d\u6765\u8ba1\u6570，\u6bd4\u5982\u6211\u4eec\u75284\u4e2a\u6bd4\u7279\u4f4d\u6765\u8ba1\u6570，\u90a3\u4e48\u5c31\u67092^4 \u4e5f\u5c31\u662f16\u4e2a\u5b57\u7b26\u4e32\u53ef\u4ee5\u6620\u5c04\u8be5\u4f4d\u7f6e，\u5982\u679c\u75288\u4e2a\u6bd4\u7279\u4f4d\u5c31\u662f2^8 \u4e5f\u5c31\u662f256\u4e2a\u5b57\u7b26\u4e32\u53ef\u4ee5\u6620\u5c04\u8be5\u4f4d\u7f6e\u3002\u4f46\u662f\u5982\u679c\u6211\u4eec\u8d85\u51fa\u4e86\u8fd9\u4e2a\u8303\u56f4（\u6bd4\u5982\u6709257\u4e2a\u5b57\u7b26\u4e32\u6620\u5c04\u4e86\u8be5\u4f4d\u7f6e），\u53ef\u80fd\u5c31\u4f1a\u51fa\u73b0\u8ba1\u6570\u6ea2\u51fa\u5bfc\u81f4\u8ba1\u6570\u56de\u7ed5\u3002<\/p>\n

3\u3001\u65e0\u6cd5\u53bb\u91cd<\/p>\n

\u00a0 \u00a0 \u00a0\u4f7f\u7528\u5f15\u7528\u8ba1\u6570\u540e，\u5982\u679c\u4e00\u4e2a\u5b57\u7b26\u4e32\u4e0d\u5c0f\u5fc3\u540c\u65f6\u63d2\u5165\u4e86\u4e24\u6b21，\u90a3\u4e48\u5bf9\u5e94\u4f4d\u7f6e\u7684\u8ba1\u6570\u90fd\u4f1a\u589e\u52a0，\u8fd9\u4e2a\u65f6\u5019\u5f53\u6211\u4eec\u4e0b\u6b21\u8981\u5220\u9664\u7684\u65f6\u5019，\u4e5f\u5fc5\u987b\u8981\u5220\u9664\u4e24\u6b21，\u5982\u679c\u53ea\u5220\u9664\u4e00\u6b21，\u90a3\u4e48\u8fd8\u662f\u53ef\u4ee5\u627e\u5f97\u5230\u3002<\/p>\n

\u00a0 \u00a0 \u00a0\u7efc\u5408\u4e0a\u9762\u7684\u4e09\u79cd\u7f3a\u9677，\u6211\u4eec\u53ef\u4ee5\u5f97\u5230\u4e00\u4e2a\u7ed3\u8bba\u5c31\u662f\u2014\u2014\u5e03\u9686\u8fc7\u6ee4\u5668\u5e76\u4e0d\u9002\u5e94\u5220\u9664\u7684\u573a\u666f，\u5c24\u5176\u662f\u7b2c\u4e00\u4e2a\u7f3a\u9677\u6700\u4e3a\u4e25\u91cd，\u4e25\u91cd\u65f6\u4f1a\u5bfc\u81f4\u6570\u636e\u4e22\u5931！！！<\/span><\/p>\n

2.8 \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u4f18\u70b9<\/span><\/h3>\n

1. \u589e\u52a0\u548c\u67e5\u8be2\u5143\u7d20\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a:O(K),<\/span> (K\u4e3a\u54c8\u5e0c\u51fd\u6570\u7684\u4e2a\u6570，\u4e00\u822c\u6bd4\u8f83\u5c0f)，\u4e0e\u6570\u636e\u91cf\u5927\u5c0f\u65e0\u5173<\/p>\n

2. \u54c8\u5e0c\u51fd\u6570\u76f8\u4e92\u4e4b\u95f4\u6ca1\u6709\u5173\u7cfb（\u53ef\u591a\u6b21\u8fdb\u884c\u54c8\u5e0c\u5207\u5272）<\/span>，\u65b9\u4fbf\u786c\u4ef6\u5e76\u884c\u8fd0\u7b97<\/p>\n

3. \u5e03\u9686\u8fc7\u6ee4\u5668\u4e0d\u9700\u8981\u5b58\u50a8\u5143\u7d20\u672c\u8eab<\/span>，\u5728\u67d0\u4e9b\u5bf9\u4fdd\u5bc6\u8981\u6c42\u6bd4\u8f83\u4e25\u683c\u7684\u573a\u5408\u6709\u5f88\u5927\u4f18\u52bf<\/span><\/p>\n

4. \u5728\u80fd\u591f\u627f\u53d7\u4e00\u5b9a\u7684\u8bef\u5224<\/span>\u65f6，\u5e03\u9686\u8fc7\u6ee4\u5668\u6bd4\u5176\u4ed6\u6570\u636e\u7ed3\u6784\u6709\u8fd9\u5f88\u5927\u7684\u7a7a\u95f4\u4f18\u52bf<\/p>\n

5. \u6570\u636e\u91cf\u5f88\u5927\u65f6，\u5e03\u9686\u8fc7\u6ee4\u5668\u53ef\u4ee5\u8868\u793a\u5168\u96c6，\u5176\u4ed6\u6570\u636e\u7ed3\u6784\u4e0d\u80fd<\/p>\n

6. \u4f7f\u7528\u540c\u4e00\u7ec4\u6563\u5217\u51fd\u6570\u7684\u5e03\u9686\u8fc7\u6ee4\u5668\u53ef\u4ee5\u8fdb\u884c\u4ea4\u3001\u5e76\u3001\u5dee\u8fd0\u7b97(\u54c8\u5e0c\u5207\u5272)<\/span><\/p>\n

2.9 \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u7f3a\u70b9<\/span><\/h3>\n

1. \u6709\u8bef\u5224\u7387，\u5373\u5b58\u5728\u5047\u9633\u6027(False Position)，\u5373\u4e0d\u80fd\u51c6\u786e\u5224\u65ad\u5143\u7d20\u662f\u5426\u5728\u96c6\u5408\u4e2d(\u8865\u6551\u65b9\u6cd5：1，\u518d \u5efa\u7acb\u4e00\u4e2a\u767d\u540d\u5355，\u5b58\u50a8\u53ef\u80fd\u4f1a\u8bef\u5224\u7684\u6570\u636e\u30022，\u5bf9\u5728\u7684\u573a\u666f\u8fdb\u884c\u7279\u6b8a\u5904\u7406<\/span>)<\/p>\n

2. \u4e0d\u80fd\u83b7\u53d6\u5143\u7d20\u672c\u8eab<\/span><\/p>\n

3. \u4e00\u822c\u60c5\u51b5\u4e0b\u4e0d\u80fd\u4ece\u5e03\u9686\u8fc7\u6ee4\u5668\u4e2d\u5220\u9664\u5143\u7d20<\/span><\/p>\n

4. \u5982\u679c\u91c7\u7528\u8ba1\u6570\u65b9\u5f0f\u5220\u9664，\u53ef\u80fd\u4f1a\u5b58\u5728\u8ba1\u6570\u56de\u7ed5\u3001\u5220\u9664\u4e0d\u5728\u7684\u5143\u7d20\u3001\u65e0\u6cd5\u53bb\u91cd\u7b49\u95ee\u9898\u3002<\/p>\n

2.10 \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u6d77\u91cf\u6570\u636e\u5904\u7406<\/h3>\n

1\u3001\u7ed9\u4e24\u4e2a\u6587\u4ef6，\u5206\u522b\u6709100\u4ebf\u4e2aquery（\u672c\u8d28\u5c31\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32，\u5982sql\u8bed\u53e5<\/span>），\u6211\u4eec\u53ea\u67091G\u5185\u5b58，\u5982\u4f55\u627e\u5230\u4e24\u4e2a\u6587\u4ef6\u4ea4\u96c6？\u5206\u522b\u7ed9\u51fa\u7cbe\u786e\u7b97\u6cd5\u548c\u8fd1\u4f3c\u7b97\u6cd5<\/p>\n

\"\"<\/p>\n

\u603b\u7ed3：<\/p>\n

1,\u5229\u7528\u4e00\u4e2a\u54c8\u5e0c\u51fd\u6570\u8fdb\u884c\u54c8\u5e0c\u5207\u5206，\u6839\u636e\u5177\u4f53\u60c5\u51b5\u5c06A\u548cB\u5206\u522b\u5207\u5272\u6210\u591a\u4e2a\u5c0f\u6587\u4ef6\u3002<\/p>\n

2,\u7528\u4e00\u4e2aset\u6765\u8bfb\u53d6\u5c0f\u6587\u4ef6<\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u5982\u679c\u90fd\u53ef\u4ee5\u63d2\u5165，\u90a3\u4e48\u5c31\u662f\u4ee5\u4e0b\u4e24\u79cd\u60c5\u51b5：（1）\u5355\u4e2a\u6587\u4ef6\u6bd4\u8f83\u5c0f，\u6240\u4ee5\u53ef\u4ee5\u63d2\u5165\u8fdb\u53bb\u3002（2）\u5355\u4e2a\u6587\u4ef6\u6bd4\u8f83\u5927，\u4f46\u662f\u5176\u4e2d\u5b58\u5728\u67d0\u4e2a\u5927\u91cf\u91cd\u590d\u7684query（\u6b64\u65f6\u6362\u4e2a\u54c8\u5e0c\u51fd\u6570\u5207\u5272\u4e5f\u662f\u6ca1\u7528\u7684，\u5207\u4e0d\u52a8<\/span>）\u3002\u4f46\u662f\u7531\u4e8eset\u4e0d\u652f\u6301\u952e\u503c\u5197\u4f59，\u6240\u4ee5\u90fd\u4e0d\u4f1a\u6b63\u786e\u63d2\u5165\u8fdb\u53bb\u3002 \u6b64\u65f6\u76f4\u63a5\u628a\u53e6\u4e00\u4e2a\u6587\u4ef6\u62ff\u8fc7\u6765\u6bd4\u5bf9\u5373\u53ef\u3002<\/span><\/p>\n

\u00a0 \u00a0 \u00a0 \u00a0\u5982\u679c\u63d2\u5165\u7684\u8fc7\u7a0b\u4e2d\u51fa\u73b0\u629b\u5f02\u5e38（\u5185\u5b58\u4e0d\u591f\u624d\u4f1a\u629b\u5f02\u5e38）<\/span>，\u90a3\u4e48\u5c31\u662f\u4ee5\u4e0b\u60c5\u51b5：\u5355\u4e2a\u6587\u4ef6\u6bd4\u8f83\u5927，\u5e76\u4e14\u5b58\u5728\u5927\u91cf\u4e0d\u540c\u7684query，\u6b64\u65f6\u6211\u4eec\u5c31\u518d\u6362\u4e00\u4e2a\u54c8\u5e0c\u51fd\u6570\u8fdb\u884c\u5207\u5272，\u5c06\u8be5\u6587\u4ef6\u5207\u5f97\u66f4\u5c0f\u4e00\u70b9\u3002<\/span><\/p>\n

2.11 \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u8bef\u5224\u7387\u6d4b\u8bd5\u4ee3\u7801<\/span><\/h3>\n

void test_bloomfilter2()
\n{
\nsrand((unsigned int)time(0));
\nconst size_t N = 10000;
\nBloomFilter<N> bf;<\/p>\n

vector<string> v1;
\nstring url = "https:\/\/www.cnblogs.com\/-clq\/archive\/2012\/05\/31\/2528153.html";<\/p>\n

for (size_t i = 0; i < N; ++i)
\n{
\nv1.push_back(url + to_string(i));
\n}<\/p>\n

for (auto& str : v1)
\n{
\nbf.set(str);
\n}<\/p>\n

\/\/ v2\u8ddfv1\u662f\u76f8\u4f3c\u5b57\u7b26\u4e32\u96c6，\u4f46\u662f\u4e0d\u4e00\u6837
\nvector<string> v2;
\nfor (size_t i = 0; i < N; ++i)
\n{
\nstring url = "https:\/\/www.cnblogs.com\/-clq\/archive\/2012\/05\/31\/2528153.html";
\nurl += to_string(999999 + i);
\nv2.push_back(url);
\n}<\/p>\n

size_t n2 = 0;
\nfor (auto& str : v2)
\n{
\nif (bf.test(str))
\n{
\n++n2;
\n}
\n}
\ncout << "\u76f8\u4f3c\u5b57\u7b26\u4e32\u8bef\u5224\u7387:" << (double)n2 \/ (double)N << endl;<\/p>\n

\/\/ \u4e0d\u76f8\u4f3c\u5b57\u7b26\u4e32\u96c6
\nvector<string> v3;
\nfor (size_t i = 0; i < N; ++i)
\n{
\nstring url = "zhihu.com";
\n\/\/string url = "https:\/\/www.cctalk.com\/m\/statistics\/live\/16845432622875";
\nurl += to_string(i + rand());
\nv3.push_back(url);
\n}<\/p>\n

size_t n3 = 0;
\nfor (auto& str : v3)
\n{
\nif (bf.test(str))
\n{
\n++n3;
\n}
\n}
\ncout << "\u4e0d\u76f8\u4f3c\u5b57\u7b26\u4e32\u8bef\u5224\u7387:" << (double)n3 \/ (double)N << endl; <\/p>\n

\u5f53X\u4e3a4\u7684\u65f6\u5019<\/p>\n

\"\"\u00a0\u5f53X\u4e3a5\u7684\u65f6\u5019<\/p>\n

\"\"<\/p>\n

\u5f53X\u4e3a6\u7684\u65f6\u5019<\/p>\n

\"\"\u00a0\u5f53X\u662f7\u7684\u65f6\u5019<\/p>\n

\"\"<\/p>\n

\u00a0\u6211\u4eec\u53d1\u73b06\u7684\u65f6\u5019\u8fdb\u6b65\u662f\u6bd4\u8f83\u660e\u663e\u7684，\u6240\u4ee5\u6700\u540e\u6211\u9009\u62e9\u4e866<\/p>\n

2.12\u00a0\u54c8\u5e0c\u5207\u5272<\/h3>\n

\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u7ed9\u4e00\u4e2a\u8d85\u8fc7100G\u5927\u5c0f\u7684log file, log\u4e2d\u5b58\u7740IP\u5730\u5740, \u8bbe\u8ba1\u7b97\u6cd5\u627e\u5230\u51fa\u73b0\u6b21\u6570\u6700\u591a\u7684IP\u5730\u5740？ \u4e0e\u4e0a\u9898\u6761\u4ef6\u76f8\u540c，\u5982\u4f55\u627e\u5230top K\u7684IP？\u5982\u4f55\u76f4\u63a5\u7528Linux\u7cfb\u7edf\u547d\u4ee4\u5b9e\u73b0？ \u00a0 \u00a0\u00a0\"\"<\/p>\n

\u5982\u679c\u662ftop-K\u7684\u8bdd，\u5efa\u4e2a\u5c0f\u5806\u53bb\u4e0d\u65ad\u6bd4\u5bf9\u5373\u53ef，\u6700\u540e\u5269\u4e0b\u7684\u5c31\u662ftop-K\u3002<\/p>\n

2.13 \u5e03\u9686\u8fc7\u6ee4\u5668\u7684\u6574\u4f53\u4ee3\u7801\u5b9e\u73b0<\/h3>\n

\/\/\u60f3\u628a\u7c7b\u5f53\u51fd\u6570\u4f7f\u7528 \u5c31\u8981\u60f3\u5230\u4eff\u51fd\u6570
\n \/\/\u63d0\u4f9b\u4e09\u4e2a\u5b57\u7b26\u4e32\u54c8\u5e0c\u51fd\u6570
\nstruct BKDRHash
\n{
\nsize_t operator() (const string& s) \/\/\u5b57\u7b26\u4e32\u8f6c\u6574\u578b
\n{
\nsize_t hash = 0;
\nfor (auto e : s)
\n{
\nhash += e;
\nhash *= 31;
\n}
\nreturn hash;
\n}
\n};
\nstruct APHash
\n{
\nsize_t operator()(const string& s)
\n{
\nsize_t hash = 0;
\nfor (long i = 0; i < s.size(); i++)
\n{
\nsize_t ch = s[i];
\nif ((i & 1) == 0) hash ^= ((hash << 7) ^ ch ^ (hash >> 3));
\nelse hash ^= (~((hash << 11) ^ ch ^ (hash >> 5)));
\n}
\nreturn hash;
\n}
\n};
\nstruct DJBHash
\n{
\nsize_t operator()(const string& s)
\n{
\nsize_t hash = 5381;
\nfor (auto ch : s) hash += (hash << 5) + ch;
\nreturn hash;
\n}
\n};<\/p>\n

\/\/\u5e03\u9686\u8fc7\u6ee4\u5668 \u57fa\u672c\u4e0a\u89e3\u51b3\u7684\u662f\u5b57\u7b26\u4e32\u7684\u95ee\u9898 \u5982\u679c\u662f\u6574\u578b\u7684\u8bdd \u8fd8\u662f\u4f4d\u56fe\u66f4\u597d\u7528 \u81f3\u4e8e\u7528\u591a\u5c11\u4e2a\u54c8\u5e0c\u51fd\u6570 \u53d6\u51b3\u4e8e\u5b9e\u9645\u7684\u9700\u6c42
\n\/\/N\u8868\u793a\u6700\u591a\u4f1a\u63d2\u5165key\u7684\u4e2a\u6570
\ntemplate<size_t N,
\nsize_t X=6,
\nclass K=string,
\nclass Hash1= BKDRHash,
\nclass Hash2= APHash,
\nclass Hash3= DJBHash> \/\/K\u5e76\u4e0d\u786e\u5b9a\u662f\u4ec0\u4e48 \u901a\u8fc7\u591a\u79cdHash\u51fd\u6570\u53bb\u5e2e\u52a9\u6211\u4eec\u6620\u5c04\u4e0d\u540c\u7684\u4f4d\u7f6e
\n\/\/6\u662f\u6d4b\u8bd5\u7528\u6d4b\u8bd5\u4ee3\u7801\u6d4b\u8bd5\u51fa\u6765\u7684
\nclass BloomFilter
\n{
\npublic:
\nvoid set(const K& key)
\n{
\nsize_t len = N * X;
\nsize_t hash1 = Hash1()(key) % len;
\n_bits.set(hash1);
\nsize_t hash2 = Hash2()(key) % len;
\n_bits.set(hash2);
\nsize_t hash3 = Hash3()(key) % len;
\n_bits.set(hash3);
\n\/\/cout << hash1 << " " << hash2 << " " << hash3 << endl << endl; \/\/\u770b\u770b\u6620\u5c04\u7684\u4f4d\u7f6e
\n}<\/p>\n

bool test(const K& key)
\n{
\nsize_t len = N * X;
\nsize_t hash1 = Hash1()(key) % len;
\nif (_bits.test(hash1) == false) return false;
\nsize_t hash2 = Hash2()(key) % len;
\nif (_bits.test(hash2) == false) return false;
\nsize_t hash3 = Hash3()(key) % len;
\nif (_bits.test(hash3) == false) return false;<\/p>\n

return true;\/\/\u5728\u53ef\u80fd\u4f1a\u6709\u8bef\u5224
\n}<\/p>\n

private:
\nbitset<N*X> _bits;
\n};<\/p>\n

\"\" \u00a0 \u00a0 \u00a0\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

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