#include<bits/stdc++.h> using namespace std; int main() { int n,k; cin>>n>>k; double counta=0,countb=0,cnta=0,cntb=0; for(int i=1;i<=n;i++) { if(i%k==0) { counta++; cnta+=i; } else { countb++; cntb+=i; } } double pja,pjb; pja=cnta/counta; pjb=cntb/countb; cout<<pja<<" "<<pjb; return 0; }