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怎么才不超时!!

Posted by for_love at 2007-05-31 19:27:56 on Problem 3219
#include<stdio.h>
int c(int n,int k)
{
   if(k==0||k==n)
   return 1;
   else return c(n-1,k-1)+c(n-1,k);
}
void main()
{
   int k,n;
  while(scanf("%d %d",&n,&k)!=EOF)
  {
    printf("%d\n",c(n,k)%2);
  }
}

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