#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,k;
	double sum1 = 0,sum2 = 0;
	cin >> n >> k;
	for(int i = 1; i <= n; i++){
		if(i % k == 0){
			sum1 += i;
		}else if(i % k != 0){
			sum2 += i;
		}  
	}
	printf("%.1lf %.1lf",sum1/n,sum2/n);
	return 0;
}