View Code of Problem 51

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <ctype.h>

int main(int argc, char** argv) {
	int n;
	scanf("%d", &n); 
	int nums[10][10];
	int sum = 0;
	
	for(int i = 0;i < n; i ++) {
		for(int j = 0; j < n; j ++) {
			scanf("%d", &nums[i][j]);
			if(j <= i) {
				sum += nums[i][j];
			}
		}
	}
	
	printf("%d\n", sum);
	
}