回複：3 times are enough for 13 balls

反複地數了有數，13個字母從a應當數到m？
3次找出次品輕重，還是隻能12個吧？（前麵我看錯題了）

所有跟帖： 

• not big deal,careless,3 times are enough for 13 balls -jinjing- ♀ (273 bytes) () 05/02/2010 postreply 18:03:21

• 回複：not big deal,careless,3 times are enough for 13 balls -wushuihe- ♂ (25 bytes) () 05/03/2010 postreply 01:52:46