#include<bits/stdc++.h>
using namespace std;
int main()
{
	int x,y,z,m;
	float n;
	cin>>x>>y>>z;
	m=x+y+z;
	n=m/3.0;
	printf("%d\n%.1f",m,n);
} 

/**************************************************************
	Problem: 1602
	User: tangkaixuan
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/