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Posted by ziliang at 2006-11-23 12:00:43 on Problem 2661
In Reply To:请问各位大大，如何计算log2(n)呀？ Posted by:acmfjk at 2006-11-23 11:37:08 
#include<cmath>

int main(){
  int n=whatever..;

  double answer=log(n)/log(2);
}
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