[프로그래머스/python] lv1 해시 완주하지 못한 선수 42576번

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

프로그래머스

 

 

def solution(participant, completion):
    hashDict = {}
    sumHash = 0
    
    for part in participant:
        hashDict[hash(part)] = part
        sumHash += hash(part)
    
    for comp in completion:
        sumHash -= hash(comp)
    
    return hashDict[sumHash]