rl544
29 lines
1.2 KiB
Java
29 lines
1.2 KiB
Java
// [문제 링크]: https://school.programmers.co.kr/learn/courses/30/lessons/131128
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import java.util.*;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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class Solution {
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public String solution(String X, String Y) {
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String answer = "";
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LinkedList<Integer> linkedList = new LinkedList<>();
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HashMap<Integer, Integer> hash = new HashMap<>(), hash2 = new HashMap<>();
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for(char y : Y.toCharArray()){
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int number = Character.getNumericValue(y);
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hash.put(number,hash.getOrDefault(number,0)+1);
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}
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for(char x : X.toCharArray()){
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int number = Character.getNumericValue(x);
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hash2.put(number,hash2.getOrDefault(number,0)+1);
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}
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for(Integer key : hash.keySet()){
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if(hash2.getOrDefault(key,0)==0) continue;
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int count = Math.min(hash.get(key),hash2.get(key));
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for(int z = 0; z < count; z++)
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linkedList.add(key);
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}
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answer = Arrays.stream(linkedList.toArray()).map(String::valueOf)
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.sorted(Comparator.reverseOrder()).collect(Collectors.joining());
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return (linkedList.isEmpty())?"-1":((answer.charAt(0)=='0')?"0":answer);
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}
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} |