#include<bits/stdc++.h>
using namespace std;
int main() {
	int x,y,z;
	cin>>x>>y>>z;
	cout<<x+y+z<<endl;
	printf("%.1f",(x+y+z)/3.0);


}
/**************************************************************
	Problem: 1602
	User: linzihang
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/