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#include<vector> | |
#include<algorithm> | |
#include<cstdio> | |
#include<cstring> | |
#include<cmath> | |
#include <iostream> | |
#include <map> | |
#include <queue> | |
#include <set> | |
#include <string> | |
#include <cstdlib> | |
#include <stack> | |
#include <iomanip> | |
#include <limits> | |
using namespace std; | |
#define fi(i,a,b) for(int i=(int)a;i<=(int)b;i++) | |
#define fd(i,a,b) for(int i=(int)a;i>=(int)b;i--) | |
#define rep(i,n) for(int i=0;i<n;i++) | |
#define SET(a) memset(a,-1,sizeof(a)) | |
#define ALL(a) a.begin(),a.end() | |
#define CLR(a) memset(a,0,sizeof(a)) | |
#define FILL(a,v) memset(a,v,sizeof(a)) | |
#define READ(f) freopen(f, "r", stdin) | |
#define WRITE(f) freopen(f, "w", stdout) | |
#define INF (1<<29) | |
#define EPS 1e-9 | |
#define PI acos(-1.0) | |
//stl | |
#define sz(a) int((a).size()) | |
#define pb push_back | |
#define all(c) ((c).begin(),(c).end()) | |
#define tr(c,i) for(typeof((c).begin()) i = (c).begin(); i != (c).end(); i++) | |
#define present(c,x) ((c).find(x) != (c).end()) | |
#define cpresent(c,x) (find(all(c),x) != (c).end()) | |
#define pf printf | |
#define sf scanf | |
typedef long long ll; | |
typedef vector<int> vi; | |
typedef pair<int, int> ii; | |
typedef vector<ii> vii; | |
typedef vector<vi> vvi; | |
typedef vector<vii> vvii; | |
typedef map<string,int> msi; | |
int main() | |
{ | |
int t; | |
scanf("%d",&t); | |
getchar(); | |
getchar(); | |
int dp[101][101]; | |
while(t--) | |
{ | |
int dim; | |
char line[1001]; | |
int r=0; | |
while(gets(line) && line[0]) | |
{ | |
r++; | |
dim=strlen(line); | |
for(int i=1;i<=dim;i++) | |
{ | |
dp[r][i]=line[i-1]-'0'; | |
} | |
} | |
// for(int i=1;i<=dim;i++) | |
// { | |
// for(int j=1;j<=dim;j++) | |
// cout<<dp[i][j]; | |
// cout<<endl; | |
// | |
// } | |
//pre proccessing | |
fi(i,1,dim) | |
{ | |
fi(j,1,dim) | |
{ | |
dp[i][j]+=dp[i-1][j]+dp[i][j-1]-dp[i-1][j-1]; | |
} | |
} | |
// | |
// for(int i=1;i<=dim;i++) | |
// { | |
// for(int j=1;j<=dim;j++) | |
// cout<<dp[i][j]<<" "; | |
// cout<<endl; | |
// | |
// } | |
int mx=numeric_limits<int>::min(); | |
fi(i,1,dim) | |
{ | |
fi(j,1,dim) | |
{ | |
fi(k,i,dim) | |
{ | |
fi(l,j,dim) | |
{ | |
int temp=dp[k][l]-dp[i-1][l]-dp[k][j-1]+dp[i-1][j-1]; | |
if(temp==(l-j+1)*(k-i+1)) | |
mx=max(mx,temp); | |
} | |
} | |
} | |
} | |
if(mx==numeric_limits<int>::min()) | |
mx=0; | |
cout<<mx<<endl; | |
if(t) | |
cout<<"\n"; | |
}//end of while | |
return 0; | |
} | |
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