#include<iostream>
#include <iomanip>
using namespace std;
int main(){
	int x,y,z;
	cin>>x>>y>>z;
	cout<<x+y+z<<endl;
	cout<<fixed<<setprecision(1)<<(x+y+z)/3.0<<endl;
} 
/**************************************************************
	Problem: 1602
	User: admin
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/