zheyangOK

#include<iostream>
using namespace std;
int main(){
int a;
cin>>a;
int b=65;
for(int i=1;i<=a;i++){
for(int k=1;k<=a-i;k++)
{
cout<<" ";
}
for(int j=1;j<=(2*i-1);j++){
char c=b;
cout<<c;
}
b+=1;
cout<<endl;
}
return 0;
}