#include<iostream> #include <stdio.h> #include <string.h> #include <stdlib.h> #include <cmath> using namespace std; #pragma warning(disable:4996) int main() { int n; scanf("%d", &n); int m; int sum = 0; for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { scanf("%d", &m); if (i >= j) { sum += m; } } } printf("%d", sum); return 0; } |
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