[프로그래머스] 방금 그곡

def dateToMinute(date):
    hour,minute=map(int,date.split(':'))
    return hour*60+minute
    
def changed(song):
    if 'A#' in song:
        song=song.replace('A#','a')
    if 'C#' in song:
        song=song.replace('C#','c')
    if 'D#' in song:
        song=song.replace('D#','d')
    if 'F#' in song:
        song=song.replace('F#','f')
    if 'G#' in song:
        song=song.replace('G#','g')
    return song

def solution(m, musicinfos):
    answer = '(None)'
    infos=[]
    for music in musicinfos:
        start,end,title,song =music.split(',')
        start=dateToMinute(start)
        end=dateToMinute(end)
        song=changed(song)
        m=changed(m)
        infos.append((title,song*((end-start)//len(song))+song[:(end-start)%len(song)],end-start))
    maxi=0
    
    for info in infos:
        if m in info[1]:
            if info[2]>maxi:
                maxi=info[2]
                answer=info[0]
    
    return answer