[프로그래머스] 완주하지 못한 선수 | Javascript

문제

https://programmers.co.kr/learn/courses/30/lessons/42576

풀이

function solution(participant, completion) {
    let participantCp = participant.slice().sort();
    let completionCp = completion.slice().sort();
    
    for (let i = 0; i < participantCp.length; i++) {
        if (participantCp[i] !== completionCp[i]) {
            return participantCp[i];
        }
    }
}