60pts求条

#include<bits/stdc++.h>
using namespace std;
int n,m,f[35][35],ans=0,c,d;
int main(){
	//freopen("troops.in","r",stdin);
	//freopen("troops.out","w",stdout);
	for(int i=0;i<=35;i++){
		for(int j=0;j<=35;j++)f[i][j]=0;
	}
	cin>>n>>m;
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)
			cin>>f[i][j];
	for(int a=1;a<=n;a++){
		for(int b=1;b<=m;b++){
			int p=1;
			if(f[a][b]==1){
				for(c=a;c<=14;c++){
					for(d=b;d<=14;d++){
						if(f[c][d]==1){
							ans=max(ans,(c-a+1)*(d-b+1));
						}
						else break;
						if(f[c][d+1]==0)break;
					}
					if(f[c+1][b]==0)break;
				}
			}
		}
	}
	cout<<ans;
}