#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: chenjiahui
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/