#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,z,a;
	float b;
	cin>>x>>y>>z;
	a=x+y+z;
	cout<<a<<endl;
	b=a*1.0/3.0;
	printf("%.1f",b);
}
/**************************************************************
	Problem: 1602
	User: panyuchen
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/