回复：忘了把原题写完整，应该是：
你有没有考虑
144
no
70
You are close, but not exactly
72=(5!-4!*2)
This seems to be the best solution, can you reveal details?
Thanks.
details? please!
回复：details? please!
2*4!可以理解，5!仍不太明白。anyway, thank you!
回复：2*4!可以理解，5!仍不太明白。anyway, thank you!
sqgs
2010-04-13 12:58:36回复：忘了把原题写完整，应该是：