View Code of Problem 51

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

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