 |
| ||||
Home Page
F.A.Qs
Statistical Charts
Past Contests
Scheduled Contests
Award Contest
| ||||||||||
| Online Judge | Problem Set | Authors | Online Contests | User | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest | |||||||||
Re:请教一下为什么是求n以内完全平方数个数？谢谢In Reply To:Re:请教一下为什么是求n以内完全平方数个数？谢谢 Posted by:snowfall at 2008-05-24 21:39:06 就是求一个数的约数个数。若有奇数个约数，开门；偶数个，关门。 设有一数N有有约数B，则必有另一约数N/B，其总是成对出现。惟独完全平方数N=B*B，此是只有一个约数了，完全平方数的约数为奇数个。 Followed by:
Post your reply here: |
All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator
