#include<iostream>
using namespace std;
int main(){
	int x,y,z;
	cin>>x>>y>>z;
	cout<<x+y+z<<endl;
	cout <<("%f\n",(x+y+z)/3.0)<<endl;
	return 0;
}
/**************************************************************
	Problem: 1602
	User: xiaojingxuan
	Language: C++
	Result: Wrong Answer
****************************************************************/