[HackerRank] 01. Time Conversion

def timeConversion(s):
    hour, minute, rest = s.split(':')
    second = rest[:2]
    ampm = rest[2:]
    
    if (ampm == 'PM') and (int(hour) != 12):
        hour = str(int(hour) + 12)
    elif (ampm == 'AM') and int(hour) == 12:
        hour = '00'
        
    return '{}:{}:{}'.format(hour, minute, second)


if __name__ == '__main__':
    s = input()
    result = timeConversion(s)
    print(result)