题解 | HJ81#字符串字符匹配#

import java.util.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s1 = scanner.nextLine();
        String s2 = scanner.nextLine();
        HashSet<Character> set = new HashSet<>();
        char[] chars2 = s2.toCharArray();
        char[] chars1 = s1.toCharArray();
        for (int i = 0; i < chars2.length; i++) {
            set.add(chars2[i]);
        }
        int trueNum = 0;
        for (int i = 0; i < chars1.length; i++) {
            boolean b = set.add(chars1[i]);
            if (b) {
                trueNum++;
            }
        }
        if (trueNum > 0) {
            System.out.println("false");
        } else {
            System.out.println("true");
        }
    }

}