백준 1408 24 [Python]

h1, m1, s1 = map(int, input().split(":"))
h2, m2, s2 = map(int, input().split(":"))
t = (h2*3600 + m2*60 + s2) - (h1*3600 + m1*60 + s1)
if (t < 0):
    t += 60*60*24

h = t//3600
m = (t%3600)//60
s = t%60
print("%02d:%02d:%02d"%(h,m,s))

2023-03-12