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완주하지 못한 선수 3차 풀이 #100

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Merged
honux77 merged 2 commits into from
Feb 7, 2020
Merged

완주하지 못한 선수 3차 풀이 #100

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da9c7ab
프로그래머스 다시 풀기
honux77 Feb 7, 2020
34bd0d6
완주하지 못한 선수 - 정렬로 풀었음
honux77 Feb 7, 2020
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18 changes: 18 additions & 0 deletions 200207/honux77/programmers-42576-Solution-2.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
// 정렬 사용해서 다시 풀었음
import java.util.Arrays;

public class Solution {

public String solution(String[] participant, String[] completion) {
Arrays.sort(participant);
Arrays.sort(completion);

int i;
for (i = 0; i < completion.length; i++) {
if (!participant[i].equals(completion[i])) {
return participant[i];
}
}
return participant[i];
}
}
21 changes: 21 additions & 0 deletions 200207/honux77/programmers-42576-Solution.java
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Original file line number Diff line number Diff line change
@@ -0,0 +1,21 @@
//프로그래머스 완주하지 못한 선수

import java.util.HashMap;

public class Solution {

public String solution(String[] participant, String[] completion) {
HashMap <String, Integer> cmap = new HashMap<>();

for (String s: completion) {
cmap.put(s, cmap.getOrDefault(s, 0) + 1);
}

for (String s: participant) {
int n = cmap.getOrDefault(s, 0);
if (n == 0) return s;
cmap.put(s, n - 1);
}
return "error";
}
}