回复：吃完饭了，做道题消食吧

来源: 于 2013-10-23 17:48:50 [博客] [旧帖] [给我悄悄话] 本文已被阅读：次

If all t shirt 
there will be 681- 12*50=81 left

remain 81 can buy 81/3=27 shorts


so T shirt is 50-27=23