#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,z;
	cin>>x>>y>>z;
	int total=x+y+z;
	double average =total/3.0; 
	cout<<total<<endl;
	cout<<fixed<<setprecision(1)<<average<<endl;
	return 0;
}
/**************************************************************
	Problem: 1602
	User: xiaojingxuan
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/