Submission #183455

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Source Code Expand

#include <stdio.h>
#include <algorithm>
using namespace std;

int n,m;
int dat[128][128];
int sum[128][128];

int main(){
	scanf("%d%d",&n,&m);
	for(int i = 0; i < n; i++) {
		for(int j = 0; j < m;j ++) {
			scanf("%d",&dat[i][j]);
			if ((i+j)%2) {
				dat[i][j] = -dat[i][j];
			}
			sum[i+1][j+1] = sum[i+1][j] + sum[i][j+1] - sum[i][j] + dat[i][j];
		}
	}
	int ans = 0;
	for(int i = 0; i < n; i++) {
		for(int j = i;j<n;j++){
			for(int k = 0;k<m;k++){
				for(int l = k;l < m;l++){
					if (sum[j+1][l+1] - sum[j+1][k] - sum[i][l+1] + sum[i][k] == 0) {
						ans = max(ans, (j-i+1) * (l-k+1));
					}
				}
			}
		}
	}
	printf("%d\n",ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:10:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
./Main.cpp:13:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]

Judge Result