{"id":70266,"date":"2026-02-01T18:05:52","date_gmt":"2026-02-01T10:05:52","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/70266.html"},"modified":"2026-02-01T18:05:52","modified_gmt":"2026-02-01T10:05:52","slug":"%e6%89%93%e5%8d%a1%e4%bf%a1%e5%a5%a5%e5%88%b7%e9%a2%98%ef%bc%882776%ef%bc%89%e7%94%a8c%e5%ae%9e%e7%8e%b0%e4%bf%a1%e5%a5%a5%e9%a2%98-p3901-%e6%95%b0%e5%88%97%e6%89%be%e4%b8%8d%e5%90%8c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/70266.html","title":{"rendered":"\u6253\u5361\u4fe1\u5965\u5237\u9898\uff082776\uff09\u7528C++\u5b9e\u73b0\u4fe1\u5965\u9898 P3901 \u6570\u5217\u627e\u4e0d\u540c"},"content":{"rendered":"

P3901 \u6570\u5217\u627e\u4e0d\u540c<\/h2>\n

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

\u73b0\u6709\u6570\u5217 <\/p>\n

A<\/p>\n

1<\/p>\n

,<\/p>\n

A<\/p>\n

2<\/p>\n

,<\/p>\n

\u2026<\/p>\n

,<\/p>\n

A<\/p>\n

N<\/p>\n

A_1,A_2,\\\\ldots,A_N<\/p>\n

<\/span><\/span>A<\/span><\/span>1<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>A<\/span><\/span>2<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>\u2026<\/span><\/span>,<\/span><\/span>A<\/span><\/span>N<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>，<\/p>\n

Q<\/p>\n

Q<\/p>\n

<\/span><\/span>Q<\/span><\/span><\/span><\/span><\/span> \u4e2a\u8be2\u95ee <\/p>\n

(<\/p>\n

L<\/p>\n

i<\/p>\n

,<\/p>\n

R<\/p>\n

i<\/p>\n

)<\/p>\n

(L_i,R_i)<\/p>\n

<\/span><\/span>(<\/span>L<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>R<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>)<\/span><\/span><\/span><\/span><\/span>，\u8be2\u95ee <\/p>\n

A<\/p>\n

L<\/p>\n

i<\/p>\n

,<\/p>\n

A<\/p>\n

L<\/p>\n

i<\/p>\n

+<\/p>\n

1<\/p>\n

,<\/p>\n

\u2026<\/p>\n

,<\/p>\n

A<\/p>\n

R<\/p>\n

i<\/p>\n

A_{L_i} ,A_{L_i+1},\\\\ldots,A_{R_i}<\/p>\n

<\/span><\/span>A<\/span><\/span>L<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>A<\/span><\/span>L<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>+<\/span>1<\/span><\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>\u2026<\/span><\/span>,<\/span><\/span>A<\/span><\/span>R<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span> \u662f\u5426\u4e92\u4e0d\u76f8\u540c\u3002<\/p>\n

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

\u7b2c\u4e00\u884c，\u4e24\u4e2a\u6574\u6570 <\/p>\n

N<\/p>\n

,<\/p>\n

Q<\/p>\n

N,Q<\/p>\n

<\/span><\/span>N<\/span>,<\/span><\/span>Q<\/span><\/span><\/span><\/span><\/span>\u3002 \u7b2c\u4e8c\u884c，<\/p>\n

N<\/p>\n

N<\/p>\n

<\/span><\/span>N<\/span><\/span><\/span><\/span><\/span> \u4e2a\u6574\u6570 <\/p>\n

A<\/p>\n

1<\/p>\n

,<\/p>\n

A<\/p>\n

2<\/p>\n

,<\/p>\n

\u2026<\/p>\n

,<\/p>\n

A<\/p>\n

N<\/p>\n

A_1, A_2, \\\\ldots , A_N<\/p>\n

<\/span><\/span>A<\/span><\/span>1<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>A<\/span><\/span>2<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>\u2026<\/span><\/span>,<\/span><\/span>A<\/span><\/span>N<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u3002 \u63a5\u4e0b\u6765 <\/p>\n

Q<\/p>\n

Q<\/p>\n

<\/span><\/span>Q<\/span><\/span><\/span><\/span><\/span> \u884c，\u6bcf\u884c\u4e24\u4e2a\u6574\u6570 <\/p>\n

L<\/p>\n

i<\/p>\n

,<\/p>\n

R<\/p>\n

i<\/p>\n

L_i,R_i<\/p>\n

<\/span><\/span>L<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>,<\/span><\/span>R<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u3002<\/p>\n

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

\u5bf9\u6bcf\u4e2a\u8be2\u95ee\u8f93\u51fa\u4e00\u884c，Yes \u6216 No\u3002<\/p>\n

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

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

4 2
\n1 2 3 2
\n1 3
\n2 4<\/p>\n

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

Yes
\nNo<\/p>\n

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

\u5bf9\u4e8e <\/p>\n

50<\/p>\n

%<\/p>\n

50\\\\%<\/p>\n

<\/span><\/span>50%<\/span><\/span><\/span><\/span><\/span> \u7684\u6570\u636e，<\/p>\n

N<\/p>\n

,<\/p>\n

Q<\/p>\n

\u2264<\/p>\n

10<\/p>\n

3<\/p>\n

N,Q \\\\le 10^3<\/p>\n

<\/span><\/span>N<\/span>,<\/span><\/span>Q<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>1<\/span>0<\/span><\/span>3<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u3002 \u5bf9\u4e8e <\/p>\n

100<\/p>\n

%<\/p>\n

100\\\\%<\/p>\n

<\/span><\/span>100%<\/span><\/span><\/span><\/span><\/span> \u7684\u6570\u636e，<\/p>\n

1<\/p>\n

\u2264<\/p>\n

N<\/p>\n

,<\/p>\n

Q<\/p>\n

\u2264<\/p>\n

10<\/p>\n

5<\/p>\n

1 \\\\le N,Q \\\\le 10^5<\/p>\n

<\/span><\/span>1<\/span><\/span>\u2264<\/span><\/span><\/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>，<\/p>\n

1<\/p>\n

\u2264<\/p>\n

A<\/p>\n

i<\/p>\n

\u2264<\/p>\n

N<\/p>\n

1 \\\\le A_i \\\\le N<\/p>\n

<\/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>\u2264<\/span><\/span><\/span><\/span>N<\/span><\/span><\/span><\/span><\/span>，<\/p>\n

1<\/p>\n

\u2264<\/p>\n

L<\/p>\n

i<\/p>\n

\u2264<\/p>\n

R<\/p>\n

i<\/p>\n

\u2264<\/p>\n

N<\/p>\n

1 \\\\le L_i \\\\le R_i \\\\le N<\/p>\n

<\/span><\/span>1<\/span><\/span>\u2264<\/span><\/span><\/span><\/span>L<\/span><\/span>i<\/span><\/span><\/span><\/span>\u200b<\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span><\/span>\u2264<\/span><\/span><\/span><\/span>R<\/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>\u3002<\/p>\n

C++\u5b9e\u73b0<\/h3>\n

#<\/span>include<\/span> <bits\/stdc++.h><\/span><\/span>
\n#<\/span>define<\/span> For<\/span>(<\/span>i,<\/span> l,<\/span> r)<\/span> for<\/span>(<\/span>int<\/span> i =<\/span> (<\/span>l)<\/span>,<\/span> _end_ =<\/span> (<\/span>int<\/span>)<\/span>(<\/span>r)<\/span>;<\/span> i <=<\/span> _end_;<\/span> ++<\/span>i)<\/span><\/span><\/span>
\n#<\/span>define<\/span> Fordown<\/span>(<\/span>i,<\/span> r,<\/span> l)<\/span> for<\/span>(<\/span>int<\/span> i =<\/span> (<\/span>r)<\/span>,<\/span> _end_ =<\/span> (<\/span>int<\/span>)<\/span>(<\/span>l)<\/span>;<\/span> i >=<\/span> _end_;<\/span> —<\/span>i)<\/span><\/span><\/span>
\n#<\/span>define<\/span> Set<\/span>(<\/span>a,<\/span> v)<\/span> memset<\/span>(<\/span>a,<\/span> v,<\/span> sizeof<\/span>(<\/span>a)<\/span>)<\/span><\/span><\/span>
\nusing<\/span> namespace<\/span> std;<\/span><\/p>\n

bool<\/span> chkmin<\/span>(<\/span>int<\/span> &<\/span>a,<\/span> int<\/span> b)<\/span> {<\/span>return<\/span> b <<\/span> a ?<\/span> a =<\/span> b,<\/span> 1<\/span> :<\/span> 0<\/span>;<\/span>}<\/span>
\nbool<\/span> chkmax<\/span>(<\/span>int<\/span> &<\/span>a,<\/span> int<\/span> b)<\/span> {<\/span>return<\/span> b ><\/span> a ?<\/span> a =<\/span> b,<\/span> 1<\/span> :<\/span> 0<\/span>;<\/span>}<\/span><\/p>\n

inline<\/span> int<\/span> read<\/span>(<\/span>)<\/span> {<\/span>
\n int<\/span> x =<\/span> 0<\/span>,<\/span> fh =<\/span> 1<\/span>;<\/span> char<\/span> ch =<\/span> getchar<\/span>(<\/span>)<\/span>;<\/span>
\n for<\/span> (<\/span>;<\/span> !<\/span>isdigit<\/span>(<\/span>ch)<\/span>;<\/span> ch =<\/span> getchar<\/span>(<\/span>)<\/span> )<\/span> if<\/span> (<\/span>ch ==<\/span> '-'<\/span>)<\/span> fh =<\/span> –<\/span>1<\/span>;<\/span>
\n for<\/span> (<\/span>;<\/span> isdigit<\/span>(<\/span>ch)<\/span>;<\/span> ch =<\/span> getchar<\/span>(<\/span>)<\/span> )<\/span> x =<\/span> (<\/span>x<<<\/span>1<\/span>)<\/span> +<\/span> (<\/span>x<<<\/span>3<\/span>)<\/span> +<\/span> (<\/span>ch ^<\/span> '0'<\/span>)<\/span>;<\/span>
\n return<\/span> x *<\/span> fh;<\/span>
\n}<\/span><\/p>\n

const<\/span> int<\/span> N =<\/span> 1e5<\/span> +<\/span> 1e2<\/span>;<\/span>
\nint<\/span> n,<\/span> q;<\/span>
\nint<\/span> a[<\/span>N]<\/span>,<\/span> Left[<\/span>N]<\/span>;<\/span>
\nint<\/span> last[<\/span>N]<\/span>,<\/span> Max_Left[<\/span>N]<\/span>;<\/span>
\nvoid<\/span> input<\/span>(<\/span>)<\/span> {<\/span>
\n n =<\/span> read<\/span>(<\/span>)<\/span>;<\/span> q =<\/span> read<\/span>(<\/span>)<\/span>;<\/span>
\n For<\/span> (<\/span>i,<\/span> 1<\/span>,<\/span> n)<\/span>
\n a[<\/span>i]<\/span> =<\/span> read<\/span>(<\/span>)<\/span>;<\/span><\/p>\n

For<\/span> (<\/span>i,<\/span> 1<\/span>,<\/span> n)<\/span> {<\/span>
\n Left[<\/span>i]<\/span> =<\/span> last[<\/span>a[<\/span>i]<\/span>]<\/span>;<\/span>
\n last[<\/span>a[<\/span>i]<\/span>]<\/span> =<\/span> i;<\/span>
\n chkmax<\/span>(<\/span>Max_Left[<\/span>i]<\/span>,<\/span> Left[<\/span>i]<\/span>)<\/span>;<\/span>
\n chkmax<\/span>(<\/span>Max_Left[<\/span>i]<\/span>,<\/span> Max_Left[<\/span>i–<\/span>1<\/span>]<\/span>)<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

void<\/span> solve<\/span>(<\/span>)<\/span> {<\/span>
\n while<\/span> (<\/span>q—<\/span>)<\/span> {<\/span>
\n int<\/span> l =<\/span> read<\/span>(<\/span>)<\/span>,<\/span> r =<\/span> read<\/span>(<\/span>)<\/span>;<\/span>
\n puts<\/span>(<\/span>Max_Left[<\/span>r]<\/span> >=<\/span> l ?<\/span> "No"<\/span> :<\/span> "Yes"<\/span>)<\/span>;<\/span>
\n }<\/span>
\n}<\/span><\/p>\n

int<\/span> main<\/span> (<\/span>)<\/span> {<\/span>
\n input<\/span>(<\/span>)<\/span>;<\/span>
\n solve<\/span>(<\/span>)<\/span>;<\/span>
\n return<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\"<\/p>\n

\u540e\u7eed<\/h3>\n

\u63a5\u4e0b\u6765\u6211\u4f1a\u4e0d\u65ad\u7528C++\u6765\u5b9e\u73b0\u4fe1\u5965\u6bd4\u8d5b\u4e2d\u7684\u7b97\u6cd5\u9898\u3001GESP\u8003\u7ea7\u7f16\u7a0b\u9898\u5b9e\u73b0\u3001\u767d\u540d\u5355\u8d5b\u4e8b\u8003\u9898\u5b9e\u73b0，\u8bb0\u5f55\u65e5\u5e38\u7684\u7f16\u7a0b\u751f\u6d3b\u3001\u6bd4\u8d5b\u5fc3\u5f97，\u611f\u5174\u8da3\u7684\u8bf7\u5173\u6ce8，\u6211\u540e\u7eed\u5c06\u7ee7\u7eed\u5206\u4eab\u76f8\u5173\u5185\u5bb9<\/p>\n","protected":false},"excerpt":{"rendered":"

P3901 \u6570\u5217\u627e\u4e0d\u540c
\n\u9898\u76ee\u63cf\u8ff0
\n\u73b0\u6709\u6570\u5217 A1,A2,\u2026,ANA_1,A_2,\\\\ldots,A_NA1\u200b,A2\u200b,\u2026,AN\u200b，QQQ \u4e2a\u8be2\u95ee (Li,Ri)(L_i,R_i)(Li\u200b,Ri\u200b)，\u8be2\u95ee ALi,ALi1,\u2026,ARiA_{L_i} ,A_{L_i1},\\\\ldots,A_{R_i}ALi\u200b\u200b,ALi\u200b1\u200b,\u2026,ARi\u200b\u200b \u662f\u5426\u4e92\u4e0d\u76f8\u540c\u3002
\n\u8f93\u5165\u683c\u5f0f
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