Codeforces Amusing Joke

题目链接：http://codeforces.com/problemset/problem/141/A

import java.util.HashMap;import java.util.Map;import java.util.Scanner;public class AmusingJoke {public static void main(String[] args) {Scanner scanner = new Scanner(System.in);String str1 = scanner.next();String str2 = scanner.next();String string = scanner.next();if(str1.length() + str2.length() == string.length()) {str1 = str1 + str2;char[] ch = str1.toCharArray();int n = ch.length;Map<Character, Integer> map = new HashMap<>();for(int i = 0; i < n; i++) {char temp = string.charAt(i);map.put(temp, map.getOrDefault(temp, 0)+1);}boolean flag = true;for(int i = 0; i < n; i++) {if(map.containsKey(ch[i]) && map.get(ch[i]) > 0) {map.put(ch[i], map.getOrDefault(ch[i], 0)-1);} else {flag = false;}}if(flag) {System.out.println("YES");} else {System.out.println("NO");}} else {System.out.println("NO");}}}