View Code of Problem 51

#include<stdio.h>
#include<string.h>
main()
{
	int a[100][100],i,b,c=0,j;
	scanf("%d",&b);
	for(i=0;i<b;i++)
	{
		for(j=0;j<b;j++)
			scanf("%d",&a[i][j]);
	}
	for(i=0;i<b;i++)
	{
		for(j=0;j<=i;j++)
			c=c+a[i][j];
	}
	printf("%d\n",c);
	return 0;
}

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