View Code of Problem 51

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

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