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Marathon.java
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34 lines (26 loc) · 782 Bytes
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/**
* 문제URL
* https://programmers.co.kr/learn/courses/30/lessons/42576?language=java
*/
class Marathon {
public String solution(String[] participant, String[] completion) {
String answer = "";
HashMap<String, Integer> map = new HashMap<String, Integer>();
for (String player : participant) {
map.put(player, map.getOrDefault(player, 0) + 1);
}
for (String player : completion) {
map.put(player, map.get(player) - 1);
}
Set<String> keySet = map.keySet();
Iterator<String> iter = keySet.iterator();
while (iter.hasNext()) {
String player = iter.next();
if (map.get(player) != 0) {
answer = player;
break;
}
}
return answer;
}
}