#include<bits/stdc++.h>
using namespace std;
int main(){
	int x,y,z,h=0;
	float i;
	cin>>x>>y>>z;
	h=x+y+z;
	cout<<h<<endl;
	i=(x+y+z)/3.0;
	printf("%.1f",i); 
}
/**************************************************************
	Problem: 1602
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/