求助

#include<bits/stdc++.h> 
using namespace std;
bool arr[105][105];
int dp[105][105];
int main()
{
	//freopen("input.txt","r",stdin);
	//freopen("output.txt","w",stdout);
	int n,m;cin>>n>>m;
	for(int i=1;i<=n;++i)
		for(int j=1;j<=m;++j)
			cin>>arr[i][j];
	for(int i=1;i<=n;++i)
		for(int j=1;j<=m;++j)
			if(arr[i][j])dp[i][j]=dp[i-1][j]+arr[i][j];
			else dp[i][j]=0;
	int out=0;
	for(int i=1;i<=n;++i)
		for(int j=1;j<=m;++j)
		{
			if(dp[i][j]==0)continue;
			if(dp[i][j]<=out)continue;
			if(j+dp[i][j]-1>m)continue;
			int end=j+dp[i][j]-1;
			bool flag=true;
			for(int k=j;k<=end;++k)
				if(dp[i][k]<dp[i][j])
				{flag=false;break;}
			if(flag)out=dp[i][j];
		}
	cout<<out;
	return 0;
}