23 lines
471 B
C++
23 lines
471 B
C++
#include <iostream>
|
|
using namespace std;
|
|
const int N = 110;
|
|
int a[N], b[N];
|
|
|
|
int main() {
|
|
int n;
|
|
cin >> n;
|
|
for (int i = 1; i <= n; i++)
|
|
for (int j = 1; j <= n; j++) {
|
|
int x;
|
|
cin >> x;
|
|
a[j] += x;
|
|
b[i] += x;
|
|
}
|
|
for (int i = 1; i <= n; i++)
|
|
if (a[i] != a[1] || b[i] != a[1]) {
|
|
puts("NO");
|
|
return 0;
|
|
}
|
|
puts("YES");
|
|
return 0;
|
|
} |