'commit'

TangDou/LanQiaoBei/LanQiao12XuanBaSaiZhongJi/WanMeIFangZhen_1.cpp

@@ -0,0 +1,23 @@
+#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;
+}