P=v^n \cdot S
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Recent Referers:
  1. http://www.gamedev.net/community/forums/post.asp?method=r...
  2. http://plaza.rakuten.co.jp/actuarymath/?targetdate=200812
  3. http://d.hatena.ne.jp/for-ph/edit?date=20081014
  4. http://209.85.175.104/search?q=cache:52d81VUKkgYJ:plaza.r...