定闹钟_python3
小乐乐定闹钟
http://www.nowcoder.com/questionTerminal/0f7e422e12be4a7f9958ca2a82abc775
while True:
    try:
        t, s = input().split()
        h, m = map(int, t.split(':'))
        print('{:02d}:{:02d}'.format((h+(m+int(s))//60)%24, (m+int(s))%60))
    except EOFError:
        break
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