ZOJ 1636 Evaluate Matrix Sum

大水题。。。

#include <cstdio>
#include <cstring>
using namespace std;
#define N 505
int s[N][N], n, m, l[N];

int main() {
    int T;
    scanf("%d", &T);
    for (int cas=1; cas<=T; cas++) {
        printf("Case %d:\n", cas);
        scanf("%d%d", &n, &m);
        memset(s, 0, sizeof(s));
        memset(l, 0, sizeof(l));

        int a;
        for (int i=1; i<=n; i++)
            for (int j=1; j<=m; j++) {
                scanf("%d", &a);
                l[j] += a*a;
                s[i][j] = s[i][j-1] + l[j];
            }
        int r1, r2, c1, c2;
        scanf("%d", &a);
        while (a--) {
            scanf("%d%d%d%d", &r1, &c1, &r2, &c2);
            printf("%d\n", s[r2][c2]-s[r2][c1-1]-s[r1-1][c2]+s[r1-1][c1-1]);
        }
    }
    return 0;
}