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38 lines
801 B
38 lines
801 B
#include <iostream>
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using namespace std;
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const int N = 110;
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int a[N][N];
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int main() {
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int n;
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cin >> n;
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for (int i = 1; i <= n; i++)
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for (int j = 1; j <= n; j++)
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cin >> a[i][j];
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//首行累加和
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int s = 0;
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for (int i = 1; i <= n; i++) s += a[1][i];
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//所有行进行判断
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for (int i = 1; i <= n; i++) {
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int t = 0;
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for (int j = 1; j <= n; j++) t += a[i][j];
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if (t != s) {
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puts("NO");
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return 0;
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}
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}
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// 所有列进行判断
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for (int j = 1; j <= n; j++) {
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int t = 0;
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for (int i = 1; i <= n; i++) t += a[i][j];
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if (t != s) {
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puts("NO");
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return 0;
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}
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}
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puts("YES");
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return 0;
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} |