Codeforces 236A.Boy or Girl

import java.util.HashSet;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String str = scanner.next();
        HashSet<Character> hashSet = new HashSet<>();
        for (int i = 0; i < str.length(); i++) {
            hashSet.add(str.charAt(i));
        }
        int num = hashSet.size();
        if ((num % 2 ) == 1) {
            System.out.println("IGNORE HIM!");
        }else {
            System.out.println("CHAT WITH HER!");
        }
    }
}

标签：Boy,Scanner,hashSet,HashSet,Codeforces,System,str,Girl,scanner
来源： https://www.cnblogs.com/csw2021/p/16399113.html