Hacker rank Time Conversion

#!/bin/python3
 
import math
import os
import random
import re
import sys
 
#
# Complete the 'timeConversion' function below.
#
# The function is expected to return a STRING.
# The function accepts STRING s as parameter.
#
 
def timeConversion(s):
    # Write your code here
    s=s.split(':')
    hh=int(s[0])
    mm=int(s[1])
    ss=int(s[2][0:2])
    if 'PM' in s[2] :
        if hh<12 :
            return ("%02d:%02d:%02d"%(hh+12,mm,ss))
        else:return ("%02d:%02d:%02d"%(hh,mm,ss))
    if 'AM' in s[2] :
        if hh>=12 :
            return ("%02d:%02d:%02d"%(hh-12,mm,ss))
        else:return ("%02d:%02d:%02d"%(hh,mm,ss))
if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')
 
    s = input()
 
    result = timeConversion(s)
 
    fptr.write(result + '\n')
 
    fptr.close()