printf("%d",(int)(303.0/(1.0-1/5.0-5/7.0)));
2015-09-07 23:59
2015-09-08 07:17
2015-09-08 08:28
2015-09-08 09:03
2015-09-08 09:11
2015-09-08 10:54
2015-09-08 10:55
2015-09-08 10:59
2015-09-08 11:06
2015-09-08 11:30