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