题解 | #小乐乐定闹钟#
小乐乐定闹钟
https://www.nowcoder.com/practice/0f7e422e12be4a7f9958ca2a82abc775
a = input().split() b = a[0].split(':') c = int(a[1]) x = c // 60 + int(b[0]) y = c % 60 + int(b[1]) if y > 60: y -= 60 x += 1 x %= 24 print('{:02d}:{:02d}'.format(x,y))