#include<stdio.h>
int main()
{int n,k,a[10000],sum1=0,sum2=0,n1=0,n2=0;
 scanf("%d%d",&n,&k);
 for(int i=1;i<n+1;i++)
 {a[i]=i;}
 for(int i=1;i<n+1;i++)
 {if(a[i]%k==0) 
  {sum1=sum1+a[i]; n1+=1;}
  else {sum2+=a[i]; n2+=1;}
  };
 printf("%0.1lf %0.1lf",1.0*sum1/n1,1.0*sum2/n2);
 return 0;}