回复：让人烦恼的礼金卡问题
justatry
2009-01-02 21:31:57
( reads)
For first time, make a guess $1000/(1+10%)~909. Next time, take another factor of 1/(1+10%), etc.
For first time, make a guess $1000/(1+10%)~909. Next time, take another factor of 1/(1+10%), etc.
火球魔法
2009-01-06 01:54:19回复：回复：让人烦恼的礼金卡问题