解题

#include <bits/stdc++.h>
using namespace std;
int n;
char c;
int main(){
    cin>>n>>c;
    for(int i=1;i<=n;i++)
        {
        for(int j=1;j<=n*2-1;j++)
            if(j>=(n+1-i)&&(j<=i+n-1))cout<<c;
            else cout<<" ";
        cout<<endl;
        }
    for(int i=n+1;i<=n*2-1;i++)
        {
        for(int j=1;j<=n*2-1;j++)
            if(j>=i-n+1&&j<=3*n-1-i)cout<<c;
            else cout<<" ";
        cout<<endl;
        }
    
    return 0;
}