#include<bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c;
    float s,p;
    cin>>a>>b>>c;
    s=a+b+c;
    p=h/3;
    cout<<s<<endl<<fixed<<setprecision(1)<<p;
} 
/**************************************************************
	Problem: 1602
	User: linyuhang
	Language: C++
	Result: Compile Error
****************************************************************/