#include<iostream>
#include<cmath>
using namespace std;
int main(){
char t;
cin>>t;
char x='A';
while(x!=char(t+1)){
int n=t-x;
for(int i=1;i<=n;i++)
cout<<" ";
char m='A';
while(m!=x){
cout<<m;
m=char(int(m+1));
}
while(m!='A'){
cout<<m;
m=char(int(m-1));
}
cout<<m<<endl;
x=char(x+1);
}
return 0;
}
c++写的
京公网安备 11010502036488号