#include<bits/stdc++.h> 
using namespace std;
int main(){
	int x,y,z;
	cin>>x>>y>>z;
	float p;
	cout<<z+x+y<<endl;
	p=(z+x+y)/3.0;
	printf("%.1f",p);
	return 0;
} 
/**************************************************************
	Problem: 1602
	User: fuhoubin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/