[알고리즘문제풀기] 가위 바위 보

문제

내가 작성한 정답

class Solution {
    public String solution(String rsp) {
        StringBuilder answer = new StringBuilder();
        for(String s: rsp.split("")){
            answer.append(s.equals("2")?"0"
                    :s.equals("0")?"5" :"2");
        }
        return answer.toString();
    }
}

다른 사람들의 정답

import java.util.HashMap;
import java.util.Map;

class Solution {
    public String solution(String rsp) {
        //2 - 가위, 0 - 바위, 5 - 보
        Map<String, String> winNumbers = new HashMap<>();
        winNumbers.put("2", "0");
        winNumbers.put("0", "5");
        winNumbers.put("5", "2");

        StringBuilder answer = new StringBuilder();

        for (int i = 0; i < rsp.length(); i++) {
            answer.append(winNumbers.get(rsp.substring(i, i+1)));
        }

        return answer.toString();
    }
}

import java.util.Arrays;
import java.util.stream.Collectors;

class Solution {
    public String solution(String rsp) {
        return Arrays.stream(rsp.split("")).map(s -> s.equals("2") ? "0" : s.equals("0") ? "5" : "2").collect(Collectors.joining());
    }
}