"#include<bits/stdc++.h> using namespace std; int main(){ int n,k,cnt=0,cnt1=0,p=0; cin>>n>>k; for(int i=1;i<=n;i++){ if(i%k==0) cnt+=i,p++; else cnt1+=i; } printf("%.1lf ",1.0cnt/p); printf("%.1lf",(1.0cnt1)/(n-p)); }"