View Code of Problem 51

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

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