#include<bits/stdc++.h>
using namespace std;
int main(){
    int x,y,z,c;
    double ans;
    cin>>x>>y>>z;
    c=x+y+z;
    ans=c/3.0;
    cout<<c<<endl;
    printf("%.1f",ans);
}
 
 
/**************************************************************
	Problem: 1602
	User: wangyichen2
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/