View Code of Problem 51

#include<bits/stdc++.h>
using namespace std;
int main(){
	int n;
	int sum = 0;
	cin >> n;
	int A[n][n];
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			cin >> A[i][j];
		}
	} 
	for(int i=0;i<n;i++){
		for(int j=0;j<=i;j++){
			sum+=A[i][j];
		}
	} 
	cout << sum;
} 

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