en.....

#include<iostream>
#include<string>
using namespace std;
int main(){
    string a[26]={"A","B","C","D","E","F","G","H","I","J","K","L","M","O","P","Q","R","S","T","X","Y","Z"};
    int n;
    scanf("%d",&n);
    for(int i=1;i<=n;i++){
        for(int j=0;j<=n-i-1;j++){
            cout<<" ";
        }for(int k=0;k<i*2-1;k++){
            cout<<a[i-1];
        }cout<<"\n";
    }
    return 0;
}