View Code of Problem 51

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int a[10][10];
    int N;
    scanf("%d",&N);
    int i,j;
    for(i=0;i<N;i++)
    {
        for(j=0;j<N;j++)
        {
          scanf("%d",&a[i][j]);
        }
    }
    int sum=0;
     for(i=0;i<N;i++)
    {
        for(j=0;j<(i+1);j++)
        {
            sum=sum+a[i][j];
        }
    }
    printf("%d",sum);
    return 0;
}

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