310期半数<<03,04,05,09,10,11,13,14,18,19,22,23,24,25,27,29,30,31,33,34,35,36,37,38,41,43,48,49>>】开37准
311期半数<<02,05,08,09,11,12,13,15,16,18,20,21,23,24,26,27,28,30,34,35,36,38,39,41,43,47,48,49>>】开40错
312期半数<<01,02,05,06,09,11,13,17,18,20,21,22,23,25,26,27,28,29,30,33,36,37,40,42,44,45,47,49>>】开36准
313期半数<<01,02,03,05,06,07,10,11,13,14,15,17,18,20,21,23,24,25,26,27,29,32,34,36,37,40,43,44>>】开18准
314期半数<<01,02,05,07,08,12,15,16,19,20,23,24,25,27,28,29,30,31,33,34,37,38,39,41,43,47,48,49>>】开24准
315期半数<<01,04,05,06,09,10,12,14,15,18,20,22,23,25,26,30,33,34,35,36,37,38,40,42,43,45,47,48>>】开15准
316期半数<<01,02,04,05,06,15,18,19,20,21,22,23,24,25,26,31,33,35,37,39,40,42,43,44,45,46,47,48>>】开18准
317期半数<<02,03,04,05,06,08,09,10,11,12,17,19,22,23,26,30,31,32,33,34,35,37,38,40,42,43,46,49>>】开24错
318期半数<<02,03,04,06,09,10,12,13,14,15,17,18,20,21,22,23,26,27,28,31,34,37,40,41,42,43,46,48>>】开？？