Algorithms title: 2013 Tencent programming marathon preliminary second (March 22) Q series of small stories- Why can not rewind enter first contains an integer N, N set of test cases indicated. The next N lines represent N test cases, each row including two time HH: MM: SS hh: mm: ss HH: MM: SS indicates the current time, hh: mm: ss expressed the hope that retrogression back time. [Technical Specification] 00 < = HH < = 11 00 < = hh < = 99 00 < = MM, SS, mm, ss < = 59 Sample Input 2 11:28:32 02:14:21 05:00:00 96 : 00:01 Sample Output 09:14:11 04:59:59

4510
....\4510.cbp
....\4510.depend
....\4510.layout
....\bin
....\...\Debug
....\...\.....\4510.exe
....\main.cpp
....\obj
....\...\Debug
....\...\.....\main.o

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