Simplified Sudoku

input/code.cpp: In function 'int main()':
input/code.cpp:16:10: warning: unused variable 'ok' [-Wunused-variable]
     bool ok = true;
          ^~

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;

int n;
int m[101][101];

int main()
{
    cin >> n;
    for (int i = 0; i < n; i++) {
        for (int j = 0; j < n; j++) {
            cin >> m[i][j];
        }
    }
    bool ok = true;
    for (int i = 0; i < n; i++) {
        int sum = 0;
        int sum2 = 0;
        for (int j = 0; j < n; j++) {
            sum += m[i][j];
            sum2 += m[j][i];
        }
        if (sum != n*(n+1)/2 || sum2 != n*(n+1)/2) {
            cout << "NO";
            return 0;
        }
    }

    cout << "YES";
}

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: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED