#include<stdio.h> int main() { int n, i, j, data[20][20],sum=0; scanf("%d", &n); for(i=0; i<n; ++i){ for(j=0; j<n; ++j){ scanf("%d", &data[i][j]); } } for(i=0; i<n; ++i){ for(j=0; j<=i; ++j){ sum += data[i][j]; } } printf("%d", sum); return 0; } |
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