View Code of Problem 51

#include <bits/stdc++.h>
#include <stdio.h>

using namespace std;

int main(int argc, char** args)
{
	int n;
	cin >> n;
	int** p;
	p = (int**)malloc(sizeof(int*) * n);
	int i, j;
	int sum = 0;
	for (i = 0; i < n; i++)
	{
		p[i] = (int*)malloc(sizeof(int) * n);
		for (j = 0; j < n; j++)
		{
			cin >> p[i][j];
			if (j <= i)
				sum += p[i][j];
		}
	}
	cout << sum << endl;
	return 0;
}