#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; for(int i=1;i<=n;i++) { for(int j=1;j<=n-i;j++) { cout<<" "; } char ch='A'+i-1; for(char c=ch;c>='A';c--) { cout<<c; } for(char c='B';c<=ch;c++) { cout<<c; } cout<<endl; } return 0; }
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