Commit 3b58822

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[211115] 완주하지 못한 선수

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	`1`	`+import java.util.*;`
	`2`	`+`
	`3`	`+class Solution {`
	`4`	`+ public String solution(String[] participant, String[] completion) {`
	`5`	`+ String answer = "";`
	`6`	`+ Map<String, Integer> map = new HashMap<>();`
	`7`	`+`
	`8`	`+ for(String str : participant){`
	`9`	`+ map.put(str, map.getOrDefault(str, 0)+1);`
	`10`	`+ }`
	`11`	`+`
	`12`	`+ for(String str : completion){`
	`13`	`+ map.put(str, map.get(str)-1);`
	`14`	`+ }`
	`15`	`+`
	`16`	`+ for(String key : map.keySet()){`
	`17`	`+ if(map.get(key) == 1){`
	`18`	`+ answer = key;`
	`19`	`+ }`
	`20`	`+ }`
	`21`	`+`
	`22`	`+ return answer;`
	`23`	`+ }`
	`24`	`+}`

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