#include <iostream>
#include <cmath>
using namespace std;

int main() {
	long double a,b;
	cin>>a>>b;
	cout<<(a+b)/2<<endl;
	if (a<0) {    
		a*=-1; 
	}
	if (b<0) {    
		b*=-1;
	}
	cout<<sqrt(a*b)<<endl;
	return 0;
}