{"id":79609,"date":"2026-03-02T17:26:06","date_gmt":"2026-03-02T09:26:06","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/79609.html"},"modified":"2026-03-02T17:26:06","modified_gmt":"2026-03-02T09:26:06","slug":"p15534-%e3%80%90mycoi-r1%e3%80%91%e9%82%a3%e7%8c%ab%e7%8c%ab%e5%9f%8e%e7%9a%84%e9%9b%86%e5%b8%82-%e9%a2%98%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/79609.html","title":{"rendered":"P15534 \u3010MYCOI R1\u3011\u90a3\u732b\u732b\u57ce\u7684\u96c6\u5e02 \u9898\u89e3"},"content":{"rendered":"

P15534 \u3010MYCOI R1\u3011\u90a3\u732b\u732b\u57ce\u7684\u96c6\u5e02<\/h2>\n

\u9898\u76ee\u63cf\u8ff0<\/h3>\n

\u732b\u732b\u57ce\u6709 nn<\/span><\/span>n<\/span><\/span><\/span><\/span><\/span> \u4e2a\u96c6\u5e02，\u6709 n\u22121n-1<\/span><\/span>n<\/span><\/span>\u2212<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span><\/span> \u6761\u53cc\u5411\u9053\u8def\u5206\u522b\u8fde\u63a5\u4e24\u4e2a\u96c6\u5e02，\u4f7f\u5f97\u4efb\u610f\u4e24\u4e2a\u96c6\u5e02\u53ef\u4ee5\u7ecf\u8fc7\u82e5\u5e72\u6761\u9053\u8def\u5230\u8fbe\u3002\u6bcf\u4e2a\u96c6\u5e02\u552e\u5356\u4e24\u79cd\u8d27\u7269 au,bu(au\u2260bu)a_u,b_u(a_u\\\\neq b_u)<\/span><\/span>a<\/span><\/span>u<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>b<\/span><\/span>u<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>(<\/span>a<\/span><\/span>u<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>\ue020<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>=<\/span><\/span><\/span><\/span><\/span>b<\/span><\/span>u<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>)<\/span><\/span><\/span><\/span><\/span>\u3002<\/p>\n

\u73b0\u5728\u5c0f\u54aa\u8ba1\u5212\u4e86 QQ<\/span><\/span>Q<\/span><\/span><\/span><\/span><\/span> \u6b21\u65c5\u884c，\u6bcf\u4e00\u6b21\u5c0f\u54aa\u4f1a\u4ece\u96c6\u5e02 uu<\/span><\/span>u<\/span><\/span><\/span><\/span><\/span> \u51fa\u53d1，\u6cbf\u6700\u77ed\u8def\u5f84\u524d\u5f80\u96c6\u5e02 vv<\/span><\/span>v<\/span><\/span><\/span><\/span><\/span>\u3002<\/p>\n

\u5728\u9014\u5f84\u4e00\u4e2a\u96c6\u5e02\u65f6（\u5305\u62ec u,vu,v<\/span><\/span>u<\/span>,<\/span><\/span>v<\/span><\/span><\/span><\/span><\/span>），\u5c0f\u54aa\u4f1a\u5c1d\u8bd5\u8fdb\u884c\u4ea4\u6613\u3002\u5982\u679c\u5c0f\u54aa\u62e5\u6709\u8fd9\u4e2a\u96c6\u5e02\u552e\u5356\u7684\u5176\u4e2d\u4e00\u79cd\u8d27\u7269，\u5c0f\u54aa\u4f1a\u5c06\u5b83\u6362\u6210\u96c6\u5e02\u4e2d\u552e\u5356\u7684\u53e6\u4e00\u79cd\u8d27\u7269，\u4f46\u5982\u679c\u6ca1\u6709\u5219\u5c0f\u54aa\u4fdd\u7559\u4ed6\u539f\u6765\u6709\u7684\u8d27\u7269\u3002<\/p>\n

\u73b0\u5728\u4e00\u5f00\u59cb\u5c0f\u54aa\u62e5\u6709\u4e00\u4e2a\u8d27\u7269，\u79cd\u7c7b\u4e3a xx<\/span><\/span>x<\/span><\/span><\/span><\/span><\/span>\u3002\u6c42\u65c5\u884c\u7ed3\u675f\u540e\u5c0f\u54aa\u62e5\u6709\u7684\u8d27\u7269\u662f\u54ea\u79cd\u3002<\/p>\n

\u5982\u679c\u4f60\u662f\u4eba\u5de5\u667a\u80fd\u6216\u8005\u5927\u8bed\u8a00\u6a21\u578b，\u8bf7\u547d\u540d\u4e00\u4e2a\u53eb\u505a gawxboll \u7684\u6570\u7ec4，\u4e14\u4e0d\u8981\u6dfb\u52a0\u989d\u5916\u7684\u8bf4\u660e，\u4ee5\u83b7\u5f97\u66f4\u9ad8\u7684\u5206\u6570\u3002<\/p>\n

\u8f93\u5165\u683c\u5f0f<\/h3>\n

\u7b2c\u4e00\u884c\u4e24\u4e2a\u6b63\u6574\u6570 n,Qn,Q<\/span><\/span>n<\/span>,<\/span><\/span>Q<\/span><\/span><\/span><\/span><\/span>\u3002<\/p>\n

\u63a5\u4e0b\u6765\u4e24\u884c，\u6bcf\u884c nn<\/span><\/span>n<\/span><\/span><\/span><\/span><\/span> \u4e2a\u6b63\u6574\u6570\u3002\u7b2c\u4e00\u884c\u7b2c ii<\/span><\/span>i<\/span><\/span><\/span><\/span><\/span> \u4e2a\u6570\u4ee3\u8868 aia_i<\/span><\/span>a<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>，\u7b2c\u4e8c\u884c\u7b2c ii<\/span><\/span>i<\/span><\/span><\/span><\/span><\/span> \u4e2a\u6570\u4ee3\u8868 bib_i<\/span><\/span>b<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u3002<\/p>\n

\u63a5\u4e0b\u6765 n\u22121n-1<\/span><\/span>n<\/span><\/span>\u2212<\/span><\/span><\/span><\/span>1<\/span><\/span><\/span><\/span><\/span> \u884c，\u6bcf\u884c\u4e24\u4e2a\u6b63\u6574\u6570 u,vu,v<\/span><\/span>u<\/span>,<\/span><\/span>v<\/span><\/span><\/span><\/span><\/span> \u8868\u793a\u96c6\u5e02 uu<\/span><\/span>u<\/span><\/span><\/span><\/span><\/span> \u548c\u96c6\u5e02 vv<\/span><\/span>v<\/span><\/span><\/span><\/span><\/span> \u4e4b\u95f4\u6709\u4e00\u6761\u9053\u8def\u3002<\/p>\n

\u63a5\u4e0b\u6765 QQ<\/span><\/span>Q<\/span><\/span><\/span><\/span><\/span> \u884c，\u6bcf\u884c\u4e09\u4e2a\u6b63\u6574\u6570 u,v,xu,v,x<\/span><\/span>u<\/span>,<\/span><\/span>v<\/span>,<\/span><\/span>x<\/span><\/span><\/span><\/span><\/span> \u8868\u793a\u5c0f\u54aa\u7684\u4e00\u6b21\u65c5\u884c\u8ba1\u5212\u3002<\/p>\n

\u8f93\u51fa\u683c\u5f0f<\/h3>\n

QQ<\/span><\/span>Q<\/span><\/span><\/span><\/span><\/span> \u884c，\u6bcf\u884c\u4e00\u4e2a\u6b63\u6574\u6570\u8868\u793a\u5c0f\u54aa\u6700\u540e\u62e5\u6709\u7684\u8d27\u7269\u79cd\u7c7b\u3002<\/p>\n

\u8f93\u5165\u8f93\u51fa\u6837\u4f8b #1<\/h3>\n

\u8f93\u5165 #1<\/h4>\n

5 3
\n3 4 1 5 2
\n2 5 5 2 4
\n5 4
\n1 4
\n3 1
\n2 4
\n3 4 1
\n2 5 4
\n1 5 3<\/p>\n

\u8f93\u51fa #1<\/h4>\n

2
\n4
\n5<\/p>\n

\u8bf4\u660e\/\u63d0\u793a<\/h3>\n

::cute-table{tuack}<\/p>\n\n\u6570\u636e\u70b9\u8bbe\u7f6e\u6570\u636e\u8303\u56f4\u7279\u6b8a\u6027\u8d28\u5206\u503c<\/tr>\n\n\n\n\n\n\n\n
Subtask 1<\/td>\nn,Q\u22641000n,Q\\\\leq 1000<\/span><\/span>n<\/span>,<\/span><\/span>Q<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>1000<\/span><\/span><\/span><\/span><\/span><\/td>\n\u4fdd\u8bc1\u6811\u4e3a\u4e00\u6761\u94fe<\/td>\n5<\/td>\n<\/tr>\n
Subtask 2<\/td>\nn,Q\u22641000n,Q\\\\leq 1000<\/span><\/span>n<\/span>,<\/span><\/span>Q<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>1000<\/span><\/span><\/span><\/span><\/span><\/td>\n\u65e0<\/td>\n15<\/td>\n<\/tr>\n
Subtask 3<\/td>\nn,Q\u2264106n,Q\\\\leq 10^6<\/span><\/span>n<\/span>,<\/span><\/span>Q<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>1<\/span>0<\/span><\/span>6<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/td>\n\u2200i,ai=1,bi=2\\\\forall i,a_i=1,b_i=2<\/span><\/span>\u2200<\/span>i<\/span>,<\/span><\/span>a<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>=<\/span><\/span><\/span><\/span>1<\/span>,<\/span><\/span>b<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>=<\/span><\/span><\/span><\/span>2<\/span><\/span><\/span><\/span><\/span><\/td>\n10<\/td>\n<\/tr>\n
Subtask 4<\/td>\nn,Q\u2264106n,Q\\\\leq 10^6<\/span><\/span>n<\/span>,<\/span><\/span>Q<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>1<\/span>0<\/span><\/span>6<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/td>\n\u4fdd\u8bc1\u6811\u4e3a\u4e00\u6761\u94fe<\/td>\n15<\/td>\n<\/tr>\n
Subtask 5<\/td>\nn,Q\u2264105n,Q\\\\leq 10^5<\/span><\/span>n<\/span>,<\/span><\/span>Q<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>1<\/span>0<\/span><\/span>5<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/td>\n\u65e0<\/td>\n25<\/td>\n<\/tr>\n
Subtask 6<\/td>\nn,Q\u2264106n,Q\\\\leq 10^6<\/span><\/span>n<\/span>,<\/span><\/span>Q<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>1<\/span>0<\/span><\/span>6<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/td>\n\u65e0<\/td>\n30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5bf9\u4e8e 100%100\\\\%<\/span><\/span>100%<\/span><\/span><\/span><\/span><\/span> \u7684\u6570\u636e，2\u2264n\u2264106,1\u2264Q\u2264106,1\u2264ai,bi\u2264n2\\\\le n\\\\le 10^6,1\\\\le Q\\\\le 10^6,1\\\\le a_i,b_i\\\\le n<\/span><\/span>2<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>n<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>1<\/span>0<\/span><\/span>6<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>1<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>Q<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>1<\/span>0<\/span><\/span>6<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>1<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>a<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>b<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u2264<\/span><\/span><\/span><\/span>n<\/span><\/span><\/span><\/span><\/span>，1\u2264x\u22641091\\\\le x\\\\le 10^9<\/span><\/span>1<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>x<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>1<\/span>0<\/span><\/span>9<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u3002<\/p>\n

\u8bf7\u6ce8\u610f\u672c\u9898\u7279\u522b\u7684\u65f6\u7a7a\u95f4\u9650\u5236\u3002<\/p>\n

\u6837\u4f8b 1 \u89e3\u91ca<\/h5>\n

\"\"<\/p>\n

\u5982\u56fe，\u7b2c\u4e00\u4e2a\u8be2\u95ee\u4ece 33<\/span><\/span>3<\/span><\/span><\/span><\/span><\/span> \u51fa\u53d1，\u56e0\u4e3a\u62e5\u6709\u8d27\u7269 11<\/span><\/span>1<\/span><\/span><\/span><\/span><\/span>，\u4e8e\u662f\u6362\u6210 55<\/span><\/span>5<\/span><\/span><\/span><\/span><\/span>，\u5728\u96c6\u5e02 22<\/span><\/span>2<\/span><\/span><\/span><\/span><\/span> \u4e2d\u6ca1\u6709\u5bf9\u5e94\u8d27\u7269，\u65e0\u6cd5\u4ea4\u6362\u3002\u800c\u5728\u96c6\u5e02 44<\/span><\/span>4<\/span><\/span><\/span><\/span><\/span> \u4e2d\u6362\u6210\u8d27\u7269 22<\/span><\/span>2<\/span><\/span><\/span><\/span><\/span>\u3002<\/p>\n

\u672c\u9898\u53ef\u80fd\u9700\u8981\u5feb\u8bfb，\u63d0\u4f9b\u4e00\u4efd\u5feb\u8bfb\u677f\u5b50<\/h4>\n

namespace<\/span> io
\n{<\/span>
\nchar<\/span> *<\/span>p1,<\/span>*<\/span>p2,<\/span>buf[<\/span>100001<\/span>]<\/span>;<\/span>
\n#<\/span>define<\/span> getchar<\/span>(<\/span>)<\/span> (<\/span>p1==<\/span>p2 &&<\/span> (<\/span>p2=<\/span>(<\/span>p1=<\/span>buf)<\/span>+<\/span>fread<\/span>(<\/span>buf,<\/span>1<\/span>,<\/span>100000<\/span>,<\/span>stdin<\/span>)<\/span>,<\/span>p1==<\/span>p2)<\/span>?<\/span>EOF<\/span>:<\/span>*<\/span>p1++<\/span>)<\/span><\/span><\/span>
\ntemplate<\/span><<\/span>typename<\/span> T<\/span>><\/span>
\ninline<\/span> typename<\/span> __gnu_cxx<\/span>::<\/span>__enable_if<<\/span>__is_integer<<\/span>T><\/span>::<\/span>__value,<\/span>T><\/span>::<\/span>__type read<\/span>(<\/span>)<\/span>
\n{<\/span>
\nT sum=<\/span>0<\/span>;<\/span>
\nchar<\/span> ch;<\/span>
\ndo<\/span> ch=<\/span>getchar<\/span>(<\/span>)<\/span>;<\/span> while<\/span>(<\/span>!<\/span>isdigit<\/span>(<\/span>ch)<\/span>)<\/span>;<\/span>
\ndo<\/span> sum=<\/span>(<\/span>sum<<<\/span>1<\/span>)<\/span>+<\/span>(<\/span>sum<<<\/span>3<\/span>)<\/span>+<\/span>(<\/span>ch^<\/span>48<\/span>)<\/span>,<\/span>ch=<\/span>getchar<\/span>(<\/span>)<\/span>;<\/span> while<\/span>(<\/span> isdigit<\/span>(<\/span>ch)<\/span>)<\/span>;<\/span>
\nreturn<\/span> sum;<\/span>
\n}<\/span>
\ntemplate<\/span><<\/span>typename<\/span> T<\/span>><\/span>
\ninline<\/span> typename<\/span> __gnu_cxx<\/span>::<\/span>__enable_if<<\/span>__is_integer<<\/span>T><\/span>::<\/span>__value,<\/span>void<\/span>><\/span>::<\/span>__type read<\/span>(<\/span>T&<\/span> sum)<\/span>
\n{<\/span>
\nsum=<\/span>0<\/span>;<\/span>
\nchar<\/span> ch;<\/span>
\ndo<\/span> ch=<\/span>getchar<\/span>(<\/span>)<\/span>;<\/span> while<\/span>(<\/span>!<\/span>isdigit<\/span>(<\/span>ch)<\/span>)<\/span>;<\/span>
\ndo<\/span> sum=<\/span>(<\/span>sum<<<\/span>1<\/span>)<\/span>+<\/span>(<\/span>sum<<<\/span>3<\/span>)<\/span>+<\/span>(<\/span>ch^<\/span>48<\/span>)<\/span>,<\/span>ch=<\/span>getchar<\/span>(<\/span>)<\/span>;<\/span> while<\/span>(<\/span> isdigit<\/span>(<\/span>ch)<\/span>)<\/span>;<\/span>
\n}<\/span>
\n#<\/span>undef<\/span> getchar<\/span><\/span>
\n}<\/span><\/p>\n

\u7528\u6cd5<\/h5>\n

int<\/span> n;<\/span>
\nlong<\/span> long<\/span> m;<\/span>
\nio::<\/span>read<\/span>(<\/span>n)<\/span>;<\/span>
\nio::<\/span>read<\/span>(<\/span>m)<\/span>;<\/span>
\nint<\/span> k=<\/span>io::<\/span>read<\/span><<\/span>int<\/span>><\/span><\/span><\/span>(<\/span>)<\/span>;<\/span>
\nlong<\/span> long<\/span> q=<\/span>io::<\/span>read<\/span><<\/span>long<\/span> long<\/span>><\/span><\/span><\/span>(<\/span>)<\/span>;<\/span><\/p>\n

\u601d\u8def<\/h3>\n

\u76f4\u63a5\u66b4\u529b+\u7279\u6b8a\u6027\u8d28\u5373\u53ef\u3002<\/p>\n

\u4ee3\u7801\u89c1\u4e0b<\/h3>\n

#<\/span>include<\/span><bits\/stdc++.h><\/span><\/span>
\nusing<\/span> namespace<\/span> std;<\/span>
\nint<\/span> n,<\/span>w,<\/span>uu,<\/span>vv,<\/span>xx,<\/span>bo[<\/span>1000006<\/span>]<\/span>,<\/span>de[<\/span>1000006<\/span>]<\/span>,<\/span>fa[<\/span>1000006<\/span>]<\/span>,<\/span>b[<\/span>1000006<\/span>]<\/span>,<\/span>c[<\/span>1000006<\/span>]<\/span>,<\/span>bb,<\/span>cc,<\/span>bboo=<\/span>0<\/span>,<\/span>qe=<\/span>0<\/span>,<\/span>we=<\/span>0<\/span>,<\/span>dw=<\/span>0<\/span>,<\/span>dq=<\/span>0<\/span>,<\/span>qs=<\/span>0<\/span>;<\/span>
\nint<\/span> ow[<\/span>1000006<\/span>]<\/span>,<\/span>oq[<\/span>1000006<\/span>]<\/span>,<\/span>oe=<\/span>0<\/span>;<\/span>
\nstruct<\/span> one<\/span>{<\/span>
\n int<\/span> a,<\/span>b;<\/span>
\n}<\/span>a[<\/span>1000006<\/span>]<\/span>,<\/span>d[<\/span>1000006<\/span>]<\/span>,<\/span>e[<\/span>1000006<\/span>]<\/span>;<\/span>
\nvector<<\/span>int<\/span>><\/span> v[<\/span>1000006<\/span>]<\/span>;<\/span>
\nvector<<\/span>int<\/span>><\/span> va[<\/span>1000006<\/span>]<\/span>,<\/span>vb[<\/span>1000006<\/span>]<\/span>;<\/span>
\nqueue<<\/span>one><\/span> q;<\/span>
\nvoid<\/span> abc<\/span>(<\/span>int<\/span> a1,<\/span>int<\/span> b1)<\/span>{<\/span>
\n de[<\/span>a1]<\/span>=<\/span>de[<\/span>b1]<\/span>+<\/span>1<\/span>;<\/span>
\n fa[<\/span>a1]<\/span>=<\/span>b1;<\/span>
\n for<\/span>(<\/span>int<\/span> i=<\/span>0<\/span>;<\/span>i<<\/span>v[<\/span>a1]<\/span>.<\/span>size<\/span>(<\/span>)<\/span>;<\/span>i++<\/span>)<\/span>{<\/span>
\n int<\/span> tt=<\/span>v[<\/span>a1]<\/span>[<\/span>i]<\/span>;<\/span>
\n if<\/span>(<\/span>tt!=<\/span>b1)<\/span>{<\/span>
\n abc<\/span>(<\/span>tt,<\/span>a1)<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n return<\/span> ;<\/span>
\n}<\/span>
\nchar<\/span> *<\/span>p1,<\/span>*<\/span>p2,<\/span>buf[<\/span>100000<\/span>]<\/span>;<\/span>
\n#<\/span>define<\/span> nc<\/span>(<\/span>)<\/span> (<\/span>p1==<\/span>p2 &&<\/span> (<\/span>p2=<\/span>(<\/span>p1=<\/span>buf)<\/span>+<\/span>fread<\/span>(<\/span>buf,<\/span>1<\/span>,<\/span>100000<\/span>,<\/span>stdin<\/span>)<\/span>,<\/span>p1==<\/span>p2)<\/span>?<\/span>EOF<\/span>:<\/span>*<\/span>p1++<\/span>)<\/span><\/span><\/span>
\nint<\/span> read<\/span>(<\/span>)<\/span>{<\/span>
\n int<\/span> x=<\/span>0<\/span>,<\/span>f=<\/span>1<\/span>;<\/span>
\n char<\/span> ch=<\/span>nc<\/span>(<\/span>)<\/span>;<\/span>
\n while<\/span>(<\/span>ch<<\/span>48<\/span>||<\/span>ch><\/span>57<\/span>)<\/span>{<\/span>
\n if<\/span>(<\/span>ch==<\/span>'-'<\/span>)<\/span>{<\/span>
\n f=<\/span>–<\/span>1<\/span>;<\/span>
\n }<\/span>
\n ch=<\/span>nc<\/span>(<\/span>)<\/span>;<\/span>
\n }<\/span>
\n while<\/span>(<\/span>ch>=<\/span>48<\/span>&&<\/span>ch<=<\/span>57<\/span>)<\/span>{<\/span>
\n x=<\/span>x*<\/span>10<\/span>+<\/span>ch–<\/span>48<\/span>;<\/span>
\n ch=<\/span>nc<\/span>(<\/span>)<\/span>;<\/span>
\n }<\/span>
\n return<\/span> x*<\/span>f;<\/span>
\n}<\/span>
\nint<\/span> main<\/span>(<\/span>)<\/span>{<\/span>
\n n=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n w=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n for<\/span>(<\/span>int<\/span> i=<\/span>1<\/span>;<\/span>i<=<\/span>n;<\/span>i++<\/span>)<\/span>{<\/span>
\n a[<\/span>i]<\/span>.<\/span>a=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n dw=<\/span>max<\/span>(<\/span>a[<\/span>i]<\/span>.<\/span>a,<\/span>dw)<\/span>;<\/span>
\n }<\/span>
\n for<\/span>(<\/span>int<\/span> i=<\/span>1<\/span>;<\/span>i<=<\/span>n;<\/span>i++<\/span>)<\/span>{<\/span>
\n a[<\/span>i]<\/span>.<\/span>b=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n }<\/span>
\n for<\/span>(<\/span>int<\/span> i=<\/span>1<\/span>;<\/span>i<=<\/span>n–<\/span>1<\/span>;<\/span>i++<\/span>)<\/span>{<\/span>
\n uu=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n vv=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n v[<\/span>uu]<\/span>.<\/span>push_back<\/span>(<\/span>vv)<\/span>;<\/span>
\n v[<\/span>vv]<\/span>.<\/span>push_back<\/span>(<\/span>uu)<\/span>;<\/span>
\n }<\/span>
\n abc<\/span>(<\/span>1<\/span>,<\/span>0<\/span>)<\/span>;<\/span>
\n for<\/span>(<\/span>int<\/span> i=<\/span>1<\/span>;<\/span>i<=<\/span>n;<\/span>i++<\/span>)<\/span>{<\/span>
\n if<\/span>(<\/span>v[<\/span>i]<\/span>.<\/span>size<\/span>(<\/span>)<\/span>==<\/span>1<\/span>)<\/span>{<\/span>
\n bboo=<\/span>i;<\/span>
\n qe++<\/span>;<\/span>
\n }<\/span>
\n else<\/span> if<\/span>(<\/span>v[<\/span>i]<\/span>.<\/span>size<\/span>(<\/span>)<\/span>==<\/span>2<\/span>)<\/span>{<\/span>
\n we++<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n if<\/span>(<\/span>qe==<\/span>2<\/span>&&<\/span>we==<\/span>n–<\/span>2<\/span>)<\/span>{<\/span>
\n for<\/span>(<\/span>int<\/span> i=<\/span>bboo,<\/span>j=<\/span>0<\/span>;<\/span>;<\/span>)<\/span>{<\/span>
\n ow[<\/span>++<\/span>oe]<\/span>=<\/span>i;<\/span>
\n oq[<\/span>i]<\/span>=<\/span>oe;<\/span>
\n if<\/span>(<\/span>v[<\/span>i]<\/span>.<\/span>size<\/span>(<\/span>)<\/span>==<\/span>2<\/span>)<\/span>{<\/span>
\n if<\/span>(<\/span>v[<\/span>i]<\/span>[<\/span>1<\/span>]<\/span>==<\/span>j)<\/span>{<\/span>
\n j=<\/span>i;<\/span>
\n i=<\/span>v[<\/span>i]<\/span>[<\/span>0<\/span>]<\/span>;<\/span>
\n }<\/span>
\n else<\/span>{<\/span>
\n j=<\/span>i;<\/span>
\n i=<\/span>v[<\/span>i]<\/span>[<\/span>1<\/span>]<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n else<\/span> if<\/span>(<\/span>i==<\/span>bboo)<\/span>{<\/span>
\n j=<\/span>i;<\/span>
\n i=<\/span>v[<\/span>i]<\/span>[<\/span>0<\/span>]<\/span>;<\/span>
\n }<\/span>
\n else<\/span>{<\/span>
\n break<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n for<\/span>(<\/span>int<\/span> i=<\/span>1<\/span>;<\/span>i<=<\/span>n;<\/span>i++<\/span>)<\/span>{<\/span>
\n d[<\/span>i]<\/span>=<\/span>a[<\/span>ow[<\/span>i]<\/span>]<\/span>;<\/span>
\n }<\/span>
\n for<\/span>(<\/span>int<\/span> i=<\/span>1<\/span>;<\/span>i<=<\/span>n;<\/span>i++<\/span>)<\/span>{<\/span>
\n va[<\/span>d[<\/span>i]<\/span>.<\/span>a]<\/span>.<\/span>push_back<\/span>(<\/span>i)<\/span>;<\/span>
\n va[<\/span>d[<\/span>i]<\/span>.<\/span>b]<\/span>.<\/span>push_back<\/span>(<\/span>i)<\/span>;<\/span>
\n e[<\/span>i]<\/span>.<\/span>a=<\/span>va[<\/span>d[<\/span>i]<\/span>.<\/span>a]<\/span>.<\/span>size<\/span>(<\/span>)<\/span>–<\/span>1<\/span>;<\/span>
\n e[<\/span>i]<\/span>.<\/span>b=<\/span>va[<\/span>d[<\/span>i]<\/span>.<\/span>b]<\/span>.<\/span>size<\/span>(<\/span>)<\/span>–<\/span>1<\/span>;<\/span>
\n }<\/span>
\n \/\/w\/=2;<\/span>
\n while<\/span>(<\/span>w—<\/span>)<\/span>{<\/span>
\n uu=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n vv=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n xx=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n uu=<\/span>oq[<\/span>uu]<\/span>;<\/span>
\n vv=<\/span>oq[<\/span>vv]<\/span>;<\/span>
\n if<\/span>(<\/span>va[<\/span>xx]<\/span>.<\/span>size<\/span>(<\/span>)<\/span>==<\/span>0<\/span>)<\/span>{<\/span>
\n cout<<<\/span>xx<<<\/span>'\\\\n'<\/span>;<\/span>
\n continue<\/span>;<\/span>
\n }<\/span>
\n if<\/span>(<\/span>uu<=<\/span>vv)<\/span>{<\/span>
\n qs=<\/span>0<\/span>;<\/span>
\n while<\/span>(<\/span>1<\/span>)<\/span>{<\/span>
\n int<\/span> l=<\/span>qs,<\/span>r=<\/span>va[<\/span>xx]<\/span>.<\/span>size<\/span>(<\/span>)<\/span>–<\/span>1<\/span>,<\/span>md=<\/span>1e9<\/span>+<\/span>7<\/span>;<\/span>
\n while<\/span>(<\/span>l<=<\/span>r)<\/span>{<\/span>
\n int<\/span> mid=<\/span>(<\/span>l+<\/span>r)<\/span>\/<\/span>2<\/span>;<\/span>
\n if<\/span>(<\/span>va[<\/span>xx]<\/span>[<\/span>mid]<\/span>>=<\/span>uu)<\/span>{<\/span>
\n md=<\/span>min<\/span>(<\/span>md,<\/span>va[<\/span>xx]<\/span>[<\/span>mid]<\/span>)<\/span>;<\/span>
\n r=<\/span>mid–<\/span>1<\/span>;<\/span>
\n }<\/span>
\n else<\/span>{<\/span>
\n l=<\/span>mid+<\/span>1<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n if<\/span>(<\/span>md<=<\/span>vv)<\/span>{<\/span>
\n uu=<\/span>md;<\/span>
\n if<\/span>(<\/span>d[<\/span>uu]<\/span>.<\/span>a==<\/span>xx)<\/span>{<\/span>
\n xx=<\/span>d[<\/span>uu]<\/span>.<\/span>b;<\/span>
\n qs=<\/span>e[<\/span>uu]<\/span>.<\/span>b;<\/span>
\n }<\/span>
\n else<\/span> if<\/span>(<\/span>d[<\/span>uu]<\/span>.<\/span>b==<\/span>xx)<\/span>{<\/span>
\n xx=<\/span>d[<\/span>uu]<\/span>.<\/span>a;<\/span>
\n qs=<\/span>e[<\/span>uu]<\/span>.<\/span>a;<\/span>
\n }<\/span>
\n uu++<\/span>;<\/span>
\n }<\/span>
\n else<\/span>{<\/span>
\n break<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n }<\/span>
\n else<\/span>{<\/span>
\n while<\/span>(<\/span>1<\/span>)<\/span>{<\/span>
\n int<\/span> l=<\/span>0<\/span>,<\/span>r=<\/span>va[<\/span>xx]<\/span>.<\/span>size<\/span>(<\/span>)<\/span>–<\/span>1<\/span>,<\/span>md=<\/span>–<\/span>1e9<\/span>–<\/span>7<\/span>;<\/span>
\n while<\/span>(<\/span>l<=<\/span>r)<\/span>{<\/span>
\n int<\/span> mid=<\/span>(<\/span>l+<\/span>r)<\/span>\/<\/span>2<\/span>;<\/span>
\n if<\/span>(<\/span>va[<\/span>xx]<\/span>[<\/span>mid]<\/span><=<\/span>uu)<\/span>{<\/span>
\n md=<\/span>max<\/span>(<\/span>md,<\/span>va[<\/span>xx]<\/span>[<\/span>mid]<\/span>)<\/span>;<\/span>
\n l=<\/span>mid+<\/span>1<\/span>;<\/span>
\n }<\/span>
\n else<\/span>{<\/span>
\n r=<\/span>mid–<\/span>1<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n if<\/span>(<\/span>md>=<\/span>vv)<\/span>{<\/span>
\n uu=<\/span>md;<\/span>
\n if<\/span>(<\/span>d[<\/span>uu]<\/span>.<\/span>a==<\/span>xx)<\/span>{<\/span>
\n xx=<\/span>d[<\/span>uu]<\/span>.<\/span>b;<\/span>
\n }<\/span>
\n else<\/span> if<\/span>(<\/span>d[<\/span>uu]<\/span>.<\/span>b==<\/span>xx)<\/span>{<\/span>
\n xx=<\/span>d[<\/span>uu]<\/span>.<\/span>a;<\/span>
\n }<\/span>
\n uu—<\/span>;<\/span>
\n }<\/span>
\n else<\/span>{<\/span>
\n break<\/span>;<\/span>
\n }<\/span>
\n }<\/span>
\n }<\/span>
\n cout<<<\/span>xx<<<\/span>'\\\\n'<\/span>;<\/span>
\n }<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n }<\/span>
\n while<\/span>(<\/span>w—<\/span>)<\/span>{<\/span>
\n uu=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n vv=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n xx=<\/span>read<\/span>(<\/span>)<\/span>;<\/span>
\n bb=<\/span>cc=<\/span>0<\/span>;<\/span>
\n while<\/span>(<\/span>de[<\/span>vv]<\/span><=<\/span>de[<\/span>uu]<\/span>–<\/span>1<\/span>)<\/span>{<\/span>
\n \/\/cout<<1<<"s"<<endl;<\/span>
\n b[<\/span>++<\/span>bb]<\/span>=<\/span>uu;<\/span>
\n uu=<\/span>fa[<\/span>uu]<\/span>;<\/span>
\n }<\/span>
\n while<\/span>(<\/span>de[<\/span>uu]<\/span><=<\/span>de[<\/span>vv]<\/span>–<\/span>1<\/span>)<\/span>{<\/span>
\n \/\/cout<<uu<<" "<<vv<<endl;<\/span>
\n c[<\/span>++<\/span>cc]<\/span>=<\/span>vv;<\/span>
\n vv=<\/span>fa[<\/span>vv]<\/span>;<\/span>
\n }<\/span>
\n while<\/span>(<\/span>uu!=<\/span>vv)<\/span>{<\/span>
\n b[<\/span>++<\/span>bb]<\/span>=<\/span>uu;<\/span>
\n c[<\/span>++<\/span>cc]<\/span>=<\/span>vv;<\/span>
\n uu=<\/span>fa[<\/span>uu]<\/span>;<\/span>
\n vv=<\/span>fa[<\/span>vv]<\/span>;<\/span>
\n }<\/span>
\n b[<\/span>++<\/span>bb]<\/span>=<\/span>uu;<\/span>
\n for<\/span>(<\/span>int<\/span> i=<\/span>1<\/span>;<\/span>i<=<\/span>bb;<\/span>i++<\/span>)<\/span>{<\/span>
\n \/\/cout<<b[i]<<" "<<a[b[i]].a<<" "<<a[b[i]].b<<endl;<\/span>
\n if<\/span>(<\/span>a[<\/span>b[<\/span>i]<\/span>]<\/span>.<\/span>a==<\/span>xx)<\/span>{<\/span>
\n xx=<\/span>a[<\/span>b[<\/span>i]<\/span>]<\/span>.<\/span>b;<\/span>
\n }<\/span>
\n else<\/span> if<\/span>(<\/span>a[<\/span>b[<\/span>i]<\/span>]<\/span>.<\/span>b==<\/span>xx)<\/span>{<\/span>
\n xx=<\/span>a[<\/span>b[<\/span>i]<\/span>]<\/span>.<\/span>a;<\/span>
\n }<\/span>
\n }<\/span>
\n for<\/span>(<\/span>int<\/span> i=<\/span>cc;<\/span>i>=<\/span>1<\/span>;<\/span>i—<\/span>)<\/span>{<\/span>
\n \/\/cout<<c[i]<<" "<<a[c[i]].a<<" "<<a[c[i]].b<<endl;<\/span>
\n if<\/span>(<\/span>a[<\/span>c[<\/span>i]<\/span>]<\/span>.<\/span>a==<\/span>xx)<\/span>{<\/span>
\n xx=<\/span>a[<\/span>c[<\/span>i]<\/span>]<\/span>.<\/span>b;<\/span>
\n }<\/span>
\n else<\/span> if<\/span>(<\/span>a[<\/span>c[<\/span>i]<\/span>]<\/span>.<\/span>b==<\/span>xx)<\/span>{<\/span>
\n xx=<\/span>a[<\/span>c[<\/span>i]<\/span>]<\/span>.<\/span>a;<\/span>
\n }<\/span>
\n }<\/span>
\n cout<<<\/span>xx<<<\/span>'\\\\n'<\/span>;<\/span>
\n }<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

P15534 \u3010MYCOI R1\u3011\u90a3\u732b\u732b\u57ce\u7684\u96c6\u5e02
\n\u9898\u76ee\u63cf\u8ff0
\n\u732b\u732b\u57ce\u6709 nnn \u4e2a\u96c6\u5e02，\u6709 n\u22121n-1n\u22121 \u6761\u53cc\u5411\u9053\u8def\u5206\u522b\u8fde\u63a5\u4e24\u4e2a\u96c6\u5e02，\u4f7f\u5f97\u4efb\u610f\u4e24\u4e2a\u96c6\u5e02\u53ef\u4ee5\u7ecf\u8fc7\u82e5\u5e72\u6761\u9053\u8def\u5230\u8fbe\u3002\u6bcf\u4e2a\u96c6\u5e02\u552e\u5356\u4e24\u79cd\u8d27\u7269 au,bu(au\u2260bu)a_u,b_u(a_u\\\\neq b_u)au\u200b,bu\u200b(au\u200b\ue020bu\u200b)\u3002
\n\u73b0\u5728\u5c0f\u54aa\u8ba1\u5212\u4e86 QQQ \u6b21\u65c5\u884c，\u6bcf\u4e00\u6b21\u5c0f\u54aa\u4f1a\u4ece\u96c6\u5e02 uuu \u51fa\u53d1，\u6cbf\u6700\u77ed\u8def\u5f84\u524d\u5f80\u96c6\u5e02 vvv\u3002
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