求大佬帮帮忙！！！必关！！！

#include <bits/stdc++.h>
using namespace std;
int main() {
	int n;
	char c;
    cin>>n;
    for (int i = 1; i <= n; i++) {
	    for (int j = 1; j <= i; j++) {
	        if (c != 'Z') cout << c++;
	        else cout << 'Z', c = 'A';
	    }
	    puts ("");
	}
	
    return 0;
}