#include<stdio.h> #define N 10 int main() { int n,a[N][N],i,j,sum=0; scanf("%d",&n); for(i=0;i<n;i++) { for(j=0;j<n;j++) { scanf("%d",a); } } for(i=0;i<n;i++) for(j=0;j<=i;j++) sum=sum+a[i][j]; printf("%d",sum); return 0; } |
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