{"id":176,"date":"2010-03-21T00:33:00","date_gmt":"2010-03-20T16:33:00","guid":{"rendered":"http:\/\/localhost\/?p=176"},"modified":"2010-03-21T00:33:00","modified_gmt":"2010-03-20T16:33:00","slug":"zjoi2007_checkerboard_production","status":"publish","type":"post","link":"https:\/\/www.shuizilong.com\/wjmzbmr\/?p=176","title":{"rendered":"[ZJOI2007]\u68cb\u76d8\u5236\u4f5c"},"content":{"rendered":"\n

[ZJOI2007]\u68cb\u76d8\u5236\u4f5c<\/p>\n

Time Limit:20000MS  Memory Limit:165536K
Total Submit:33 Accepted:23
Case Time Limit:10000MS<\/p>\n

Description <\/strong><\/p>\n

\u56fd\u9645\u8c61\u68cb\u662f\u4e16\u754c\u4e0a\u6700\u53e4\u8001\u7684\u535a\u5f08\u6e38\u620f\u4e4b\u4e00\uff0c\u548c\u4e2d\u56fd\u7684\u56f4\u68cb\u3001\u8c61\u68cb\u4ee5\u53ca\u65e5\u672c\u7684\u5c06\u68cb\u540c\u4eab\u76db\u540d\u3002\u636e\u8bf4\u56fd\u9645\u8c61\u68cb\u8d77\u6e90\u4e8e\u6613\u7ecf\u7684\u601d\u60f3\uff0c\u68cb\u76d8\u662f\u4e00\u4e2a8*8\u5927\u5c0f\u7684\u9ed1\u767d\u76f8\u95f4\u7684\u65b9 \u9635\uff0c\u5bf9\u5e94\u516b\u516b\u516d\u5341\u56db\u5366\uff0c\u9ed1\u767d\u5bf9\u5e94\u9634\u9633\u3002\u800c\u6211\u4eec\u7684\u4e3b\u4eba\u516c\u5c0fQ\uff0c\u6b63\u662f\u56fd\u9645\u8c61\u68cb\u7684\u72c2\u70ed\u7231\u597d\u8005\u3002\u4f5c\u4e3a\u4e00\u4e2a\u9876\u5c16\u9ad8\u624b\uff0c\u4ed6\u5df2\u4e0d\u6ee1\u8db3\u4e8e\u666e\u901a\u7684\u68cb\u76d8\u4e0e\u89c4\u5219\uff0c\u4e8e\u662f\u4ed6\u8ddf\u4ed6\u7684\u597d \u670b\u53cb\u5c0fW\u51b3\u5b9a\u5c06\u68cb\u76d8\u6269\u5927\u4ee5\u9002\u5e94\u4ed6\u4eec\u7684\u65b0\u89c4\u5219\u3002
\u5c0fQ\u627e\u5230\u4e86\u4e00\u5f20\u7531N*M\u4e2a\u6b63\u65b9\u5f62\u7684\u683c\u5b50\u7ec4\u6210\u7684\u77e9\u5f62\u7eb8\u7247\uff0c\u6bcf\u4e2a\u683c\u5b50\u88ab\u6d82\u6709\u9ed1\u767d\u4e24\u79cd\u989c\u8272\u4e4b\u4e00\u3002\u5c0fQ\u60f3\u5728\u8fd9\u79cd\u7eb8\u4e2d\u88c1\u51cf\u4e00\u90e8\u5206\u4f5c\u4e3a\u65b0\u68cb\u76d8\uff0c\u5f53\u7136\uff0c\u4ed6\u5e0c\u671b\u8fd9 \u4e2a\u68cb\u76d8\u5c3d\u53ef\u80fd\u7684\u5927\u3002\u4e0d\u8fc7\u5c0fQ\u8fd8\u6ca1\u6709\u51b3\u5b9a\u662f\u627e\u4e00\u4e2a\u6b63\u65b9\u5f62\u7684\u68cb\u76d8\u8fd8\u662f\u4e00\u4e2a\u77e9\u5f62\u7684\u68cb\u76d8\uff08\u5f53\u7136\uff0c\u4e0d\u7ba1\u54ea\u79cd\uff0c\u68cb\u76d8\u5fc5\u987b\u90fd\u9ed1\u767d\u76f8\u95f4\uff0c\u5373\u76f8\u90bb\u7684\u683c\u5b50\u4e0d\u540c\u8272\uff09\uff0c\u6240\u4ee5\u4ed6\u5e0c\u671b \u53ef\u4ee5\u627e\u5230\u6700\u5927\u7684\u6b63\u65b9\u5f62\u68cb\u76d8\u9762\u79ef\u548c\u6700\u5927\u7684\u77e9\u5f62\u68cb\u76d8\u9762\u79ef\uff0c\u4ece\u800c\u51b3\u5b9a\u54ea\u4e2a\u66f4\u597d\u4e00\u4e9b\u3002
\u4e8e\u662f\u5c0fQ\u627e\u5230\u4e86\u5373\u5c06\u53c2\u52a0\u5168\u56fd\u4fe1\u606f\u5b66\u7ade\u8d5b\u7684\u4f60\uff0c\u4f60\u80fd\u5e2e\u52a9\u4ed6\u4e48\uff1f <\/p>\n

Input <\/strong><\/p>\n

\u7b2c\u4e00\u884c\u5305\u542b\u4e24\u4e2a\u6574\u6570N\u548cM\uff0c\u5206\u522b\u8868\u793a\u77e9\u5f62\u7eb8\u7247\u7684\u957f\u548c\u5bbd\u3002\u63a5\u4e0b\u6765\u7684N\u884c\u5305\u542b\u4e00\u4e2aN * M\u768401\u77e9\u9635\uff0c\u8868\u793a\u8fd9\u5f20\u77e9\u5f62\u7eb8\u7247\u7684\u989c\u8272\uff080\u8868\u793a\u767d\u8272\uff0c1\u8868\u793a\u9ed1\u8272\uff09\u3002 <\/p>\n

Output <\/strong><\/p>\n

\u5305\u542b\u4e24\u884c\uff0c\u6bcf\u884c\u5305\u542b\u4e00\u4e2a\u6574\u6570\u3002\u7b2c\u4e00\u884c\u4e3a\u53ef\u4ee5\u627e\u5230\u7684\u6700\u5927\u6b63\u65b9\u5f62\u68cb\u76d8\u7684\u9762\u79ef\uff0c\u7b2c\u4e8c\u884c\u4e3a\u53ef\u4ee5\u627e\u5230\u7684\u6700\u5927\u77e9\u5f62\u68cb\u76d8\u7684\u9762\u79ef\uff08\u6ce8\u610f\u6b63\u65b9\u5f62\u548c\u77e9\u5f62\u662f\u53ef\u4ee5\u76f8\u4ea4\u6216\u8005\u5305\u542b \u7684\uff09\u3002 <\/p>\n

Sample Input <\/strong><\/p>\n

3 3
1 0 1
0 1 0
1 0 0<\/p>\n

Sample Output <\/strong><\/p>\n

4
6<\/p>\n

Hint <\/strong><\/p>\n

\u5bf9\u4e8e20%\u7684\u6570\u636e\uff0cN, M \u2264 80
\u5bf9\u4e8e40%\u7684\u6570\u636e\uff0cN, M \u2264 400
\u5bf9\u4e8e100%\u7684\u6570\u636e\uff0cN, M \u2264 2000 <\/p>\n

Source <\/strong><\/p>\n

61.187.179.132:8080\/JudgeOnline\/showproblem<\/a>
\u539f\u6765\u7684\u7b97\u6cd5\u662f\u6ca1\u6709\u95ee\u9898\uff0c\u4f46\u662f\u5199\u7684\u592a\u6c99\u8336\u4e86\u3002\u9996\u5148\u90a3\u73a9\u610f\u6839\u672c\u4e0d\u662f\u90a3\u4e48\u9012\u63a8\u7684\uff0c\u8981\u7528\u5230\u7c7b\u4f3c\u5355\u8c03\u961f\u5217\u7684\u7ed3\u6784\uff0c\u4e00\u5c42\u5c42\u626b\u63cf\u8fc7\u53bb\uff0c\u5bf9\u6bcf\u5c42\u7ef4\u62a4\u4ea4\u66ff\u7684\u80fd\u5411\u4e0a\u5ef6\u4f38\u591a\u5c11\uff0c\u7136\u540e\u7528\u5355\u8c03\u961f\u5217\u7b97\u51fa\u5bf9\u4e8e\u6bcf\u4e2a\u70b9\u6765\u8bf4\uff0c\u5f80\u5de6\u7b2c\u4e00\u4e2a\u9ad8\u5ea6\u5c0f\u4e8e\u5b83\u7684\u548c\u5f80\u53f3\u7b2c\u4e00\u4e2a\u5c0f\u4e8e\u5b83\u7684\u540c\u65f6\u6ce8\u610f\u4ea4\u66ff\u6027\uff0c\u7136\u540e\u66f4\u65b0\u7b54\u6848\u5c31\u53ef\u4ee5\u4e86\u3002\u3002
\u7ec6\u8282\u5f88\u8981\u7d27\uff0cWA\u4e86N\u6b21\u56e7\u3002\u3002\u901f\u5ea6\u9b3c\u6162\u4f46\u957f\u5ea6\u4e0d\u52301K\uff0c(*^__^*)
\u66f4WS\u7684\u662f\u6211\u539f\u6765\u90a3\u4e2a\u9519\u8bef\u7684\u7b97\u6cd5\u5c45\u7136\u80fd\u8fc7SPOJ\u4e0a\u7684\u6570\u636e\u5929\u54ea\u3002\u3002\u6211\u88ab\u96f7\u5230\u4e86\u3002\u3002
Code\uff1a
#include<cstdio>
#include<iostream>
#include<algorithm>
#define rep(i,n) for(int i=0;i<n;i++)
using namespace std;
int n,m,MaxS=0,MaxR=0;
const int maxn=2000+10;
int Line[maxn]={0};
int H[maxn]={0};
void ReadLine()
{
int x;
for(int i=1;i<=m;i++)
{
scanf("%d",&x);
if(x!=Line[i])H[i]++;
else H[i]=1;
Line[i]=x;
}
}
void Renew(int a,int b)
{
if(a>b) swap(a,b);
MaxS=max(MaxS,a*a);
MaxR=max(MaxR,a*b);
}
void CalLine()
{
static int L[maxn],R[maxn];
for(int i=1;i<=m;++i)
{
L[i]=i-1;
while(L[i]&&H[L[i]]>=H[i]&&Line[L[i]+1]!=Line[L[i]])
L[i]=L[L[i]];
}
for(int i=m;i>=1;–i)
{
R[i]=i+1;
while(R[i]<=m&&H[R[i]]>=H[i]&&Line[R[i]]!=Line[R[i]-1])
R[i]=R[R[i]];
}
for(int i=1;i<=m;i++) Renew(H[i],R[i]-L[i]-1);
}
int main()
{
scanf("%d %d",&n,&m);
rep(i,n)ReadLine(),CalLine();
cout<<MaxS<<endl<<MaxR<<endl;
} <\/p>\n","protected":false},"excerpt":{"rendered":"

[ZJOI2007]\u68cb\u76d8\u5236\u4f5c Time Limit:20000MS  Memory Limit:165536KTotal Submit:33 Accepted:23 Case Time Limit:10000MS Description \u56fd\u9645\u8c61\u68cb\u662f\u4e16\u754c\u4e0a\u6700\u53e4\u8001\u7684\u535a\u5f08\u6e38\u620f\u4e4b\u4e00\uff0c\u548c\u4e2d\u56fd\u7684\u56f4\u68cb\u3001\u8c61\u68cb\u4ee5\u53ca\u65e5\u672c\u7684\u5c06\u68cb\u540c\u4eab\u76db\u540d\u3002\u636e\u8bf4\u56fd\u9645\u8c61\u68cb\u8d77\u6e90\u4e8e\u6613\u7ecf\u7684\u601d\u60f3\uff0c\u68cb\u76d8\u662f\u4e00\u4e2a8*8\u5927\u5c0f\u7684\u9ed1\u767d\u76f8\u95f4\u7684\u65b9 \u9635\uff0c\u5bf9\u5e94\u516b\u516b\u516d\u5341\u56db\u5366\uff0c\u9ed1\u767d\u5bf9\u5e94\u9634\u9633\u3002\u800c\u6211\u4eec\u7684\u4e3b\u4eba\u516c\u5c0fQ\uff0c\u6b63\u662f\u56fd\u9645\u8c61\u68cb\u7684\u72c2\u70ed\u7231\u597d\u8005\u3002\u4f5c\u4e3a\u4e00\u4e2a\u9876\u5c16\u9ad8\u624b\uff0c\u4ed6\u5df2\u4e0d\u6ee1\u8db3\u4e8e\u666e\u901a\u7684\u68cb\u76d8\u4e0e\u89c4\u5219\uff0c\u4e8e\u662f\u4ed6\u8ddf\u4ed6\u7684\u597d \u670b\u53cb\u5c0fW\u51b3\u5b9a\u5c06\u68cb\u76d8\u6269\u5927\u4ee5\u9002\u5e94\u4ed6\u4eec\u7684\u65b0\u89c4\u5219\u3002 \u5c0fQ\u627e\u5230\u4e86\u4e00\u5f20\u7531N*M\u4e2a\u6b63\u65b9\u5f62\u7684\u683c\u5b50\u7ec4\u6210\u7684\u77e9\u5f62\u7eb8\u7247\uff0c\u6bcf\u4e2a\u683c\u5b50\u88ab\u6d82\u6709\u9ed1\u767d\u4e24\u79cd\u989c\u8272\u4e4b\u4e00\u3002\u5c0fQ\u60f3\u5728\u8fd9\u79cd\u7eb8\u4e2d\u88c1\u51cf\u4e00\u90e8\u5206\u4f5c\u4e3a\u65b0\u68cb\u76d8\uff0c\u5f53\u7136\uff0c\u4ed6\u5e0c\u671b\u8fd9 \u4e2a\u68cb\u76d8\u5c3d\u53ef\u80fd\u7684\u5927\u3002\u4e0d\u8fc7\u5c0fQ\u8fd8\u6ca1\u6709\u51b3\u5b9a\u662f\u627e\u4e00\u4e2a\u6b63\u65b9\u5f62\u7684\u68cb\u76d8\u8fd8\u662f\u4e00\u4e2a\u77e9\u5f62\u7684\u68cb\u76d8\uff08\u5f53\u7136\uff0c\u4e0d\u7ba1\u54ea\u79cd\uff0c\u68cb\u76d8\u5fc5\u987b\u90fd\u9ed1\u767d\u76f8\u95f4\uff0c\u5373\u76f8\u90bb\u7684\u683c\u5b50\u4e0d\u540c\u8272\uff09\uff0c\u6240\u4ee5\u4ed6\u5e0c\u671b \u53ef\u4ee5\u627e\u5230\u6700\u5927\u7684\u6b63\u65b9\u5f62\u68cb\u76d8\u9762\u79ef\u548c\u6700\u5927\u7684\u77e9\u5f62\u68cb\u76d8\u9762\u79ef\uff0c\u4ece\u800c\u51b3\u5b9a\u54ea\u4e2a\u66f4\u597d\u4e00\u4e9b\u3002 \u4e8e\u662f\u5c0fQ\u627e\u5230\u4e86\u5373\u5c06\u53c2\u52a0\u5168\u56fd\u4fe1\u606f\u5b66\u7ade\u8d5b\u7684\u4f60\uff0c\u4f60\u80fd\u5e2e\u52a9\u4ed6\u4e48\uff1f Input \u7b2c\u4e00\u884c\u5305\u542b\u4e24\u4e2a\u6574\u6570N\u548cM\uff0c\u5206\u522b\u8868\u793a\u77e9\u5f62\u7eb8\u7247\u7684\u957f\u548c\u5bbd\u3002\u63a5\u4e0b\u6765\u7684N\u884c\u5305\u542b\u4e00\u4e2aN * M\u768401\u77e9\u9635\uff0c\u8868\u793a\u8fd9\u5f20\u77e9\u5f62\u7eb8\u7247\u7684\u989c\u8272\uff080\u8868\u793a\u767d\u8272\uff0c1\u8868\u793a\u9ed1\u8272\uff09\u3002 Output \u5305\u542b\u4e24\u884c\uff0c\u6bcf\u884c\u5305\u542b\u4e00\u4e2a\u6574\u6570\u3002\u7b2c\u4e00\u884c\u4e3a\u53ef\u4ee5\u627e\u5230\u7684\u6700\u5927\u6b63\u65b9\u5f62\u68cb\u76d8\u7684\u9762\u79ef\uff0c\u7b2c\u4e8c\u884c\u4e3a\u53ef\u4ee5\u627e\u5230\u7684\u6700\u5927\u77e9\u5f62\u68cb\u76d8\u7684\u9762\u79ef\uff08\u6ce8\u610f\u6b63\u65b9\u5f62\u548c\u77e9\u5f62\u662f\u53ef\u4ee5\u76f8\u4ea4\u6216\u8005\u5305\u542b \u7684\uff09\u3002 Sample Input 3 31 0 10 1 01 0 0 Sample Output 46 Hint \u5bf9\u4e8e20%\u7684\u6570\u636e\uff0cN, M \u2264 80 \u5bf9\u4e8e40%\u7684\u6570\u636e\uff0cN, M \u2264 400 \u5bf9\u4e8e100%\u7684\u6570\u636e\uff0cN, M \u2264 2000 Source 61.187.179.132:8080\/JudgeOnline\/showproblem\u539f\u6765\u7684\u7b97\u6cd5\u662f\u6ca1\u6709\u95ee\u9898\uff0c\u4f46\u662f\u5199\u7684\u592a\u6c99\u8336\u4e86\u3002\u9996\u5148\u90a3\u73a9\u610f\u6839\u672c\u4e0d\u662f\u90a3\u4e48\u9012\u63a8\u7684\uff0c\u8981\u7528\u5230\u7c7b\u4f3c\u5355\u8c03\u961f\u5217\u7684\u7ed3\u6784\uff0c\u4e00\u5c42\u5c42\u626b\u63cf\u8fc7\u53bb\uff0c\u5bf9\u6bcf\u5c42\u7ef4\u62a4\u4ea4\u66ff\u7684\u80fd\u5411\u4e0a\u5ef6\u4f38\u591a\u5c11\uff0c\u7136\u540e\u7528\u5355\u8c03\u961f\u5217\u7b97\u51fa\u5bf9\u4e8e\u6bcf\u4e2a\u70b9\u6765\u8bf4\uff0c\u5f80\u5de6\u7b2c\u4e00\u4e2a\u9ad8\u5ea6\u5c0f\u4e8e\u5b83\u7684\u548c\u5f80\u53f3\u7b2c\u4e00\u4e2a\u5c0f\u4e8e\u5b83\u7684\u540c\u65f6\u6ce8\u610f\u4ea4\u66ff\u6027\uff0c\u7136\u540e\u66f4\u65b0\u7b54\u6848\u5c31\u53ef\u4ee5\u4e86\u3002\u3002\u7ec6\u8282\u5f88\u8981\u7d27\uff0cWA\u4e86N\u6b21\u56e7\u3002\u3002\u901f\u5ea6\u9b3c\u6162\u4f46\u957f\u5ea6\u4e0d\u52301K\uff0c(*^__^*) \u66f4WS\u7684\u662f\u6211\u539f\u6765\u90a3\u4e2a\u9519\u8bef\u7684\u7b97\u6cd5\u5c45\u7136\u80fd\u8fc7SPOJ\u4e0a\u7684\u6570\u636e\u5929\u54ea\u3002\u3002\u6211\u88ab\u96f7\u5230\u4e86\u3002\u3002Code\uff1a#include<cstdio>#include<iostream>#include<algorithm>#define rep(i,n) […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[10],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts\/176"}],"collection":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=176"}],"version-history":[{"count":0,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=\/wp\/v2\/posts\/176\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=176"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=176"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.shuizilong.com\/wjmzbmr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=176"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}