알고리즘과 입출력_백준_2445

#include <iostream>
using namespace std;
 
int main() {
    int num;
    cin >> num;
    for (int i = 1; i <= num; i++) {
        for (int j = 0; j < i; j++) {
            cout << "*";
        }
        for (int j = 1; j <= 2 * num - 2 * i; j++) {
            cout << " ";
        }
        for (int j = 0; j < i; j++) {
            cout << "*";
        }
        cout << endl;
    }
 
    --num;
    for (int i = 0; i < num; i++) {
        for (int j = 1; j <= num - i; j++) {
            cout << "*";
        }
        for (int j = 0; j < 2 * i + 2; j++) {
            cout << " ";
        }
        for (int j = 1; j <= num - i; j++) {
            cout << "*";
        }
        cout << endl;
    }
 
    return 0;
}