View Code of Problem 51

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

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