ratar

#include <bits/stdc++.h>
#define ll int//long long
#define INF 999999999
#define N (1<<17)
#define M 1000000007
#define C 5000

using namespace std;

ll ans = 0;
ll v[52][52];
ll m[52][52][C];
ll m2[52][52][C];

const inline ll sum (const ll x1, const ll x2, const ll y1, const ll y2) {
  ll s = v[y2][x2];
  if (x1) s -= v[y2][x1-1];
  if (y1) s -= v[y1-1][x2];
  if (x1 && y1) s += v[y1-1][x1-1];
  return ((s % C) + C) % C;
}

int main () {
  cin.sync_with_stdio(0);
  cin.tie(0);
  int n;
  cin>>n;
  for (int y = 0; y < n; y++) {
    for (int x = 0; x <n; x++) {
      cin>>v[y][x];
      //v[y][x] = 1;
      if (x) v[y][x] += v[y][x - 1];
    }
  }
  for(int y = 1; y < n; y++) {
    for (int x = 0; x < n; x++) {
     v[y][x] += v[y - 1][x]; 
    }
  }
  for (ll y = 0; y < n; y++) {
    for (ll x = 0; x <n; x++) {
      for (ll y1 = 0; y1 <= y; y1++) {
	for (ll x1 = 0; x1 <= x; x1++) {
	  ll s = sum(x1, x, y1, y);
	  m[y1][x1][s]++;
	  m2[y + 1][x1][s]++;
	}
      }
    }
  }
  for (ll y = 0; y < n; y++) {
    for (ll x = 0; x <n; x++) {
      for (ll y1 = 0; y1 <= y; y1++) {
	for (ll x1 = 0; x1 <= x; x1++) {
	  ll s = sum(x1, x, y1, y);
	  ans += m[y + 1][x + 1][s];
	  ans += m2[y1][x + 1][s];
	}
      }
    }
  }
  cout<<ans<<endl;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: ACCEPTED

Test 9

Verdict: WRONG ANSWER

Test 10

Verdict: WRONG ANSWER

Test 11

Verdict: WRONG ANSWER

Test 12

Verdict: WRONG ANSWER

Test 13

Verdict: WRONG ANSWER