#include<stdio.h> int main() { int s1[11][11], i, j, n, m, sum = 0; scanf("%d", &n); for (i = 0;i < n;i++) for (j = 0;j < n;j++) scanf("%d", &s1[i][j]); for (i = 0;i < n;i++) for (j = 0;j < n;j++) { if (i >= j) sum = sum + s1[i][j]; } printf("%d\n", sum); return 0; } |
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