View Code of Problem 53

#include<iostream>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <cmath>
#include <algorithm>
using namespace std;
#pragma warning(disable:4996)


int main() {
	int n;
	scanf("%d", &n);
	for (int i = 0; i < 2*n-1; i++) {
		for (int j = 0; j < 2*n-1; j++) {
			if (i + j >= n - 1 && i - j <= n - 1 && i - j >= -(n - 1) && i + j <= 3 * (n - 1)) {
				printf("*");
			}
			else if (i + j < n - 1 || i - j > n - 1) {
				printf(" ");
			}
		}
		printf("\n");
	}
	return 0;
}