View Code of Problem 51

#include<stdio.h>
#include<string.h>
int main()
{
	int n,i,j,sum=0;
	int a[10][10];
	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 + 1; j++)
			sum = sum + a[i][j];
	printf("%d", sum);
	return 0;
}

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