正解

#include<bits/stdc++.h>
#define ll long long
using namespace std;
char c;
int main(){
    cin >> c;
    for (int i = 1;i <= 3;i++) {
        for (int j = 1;j <= 3 - i;j++) cout << " ";
        for (int j = 1;j < 2 * i;j++) cout << c;
        cout << "\n";
    }
    for (int i = 2;i >= 1;i--) {
        for (int j = 1;j <= 3 - i;j++) cout << " ";
        for (int j = 1;j < 2 * i;j++) cout << c;
        cout << "\n";
    }
}