#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: huanglingkai
	Language: C++
	Result: Accepted
	Time:7 ms
	Memory:2072 kb
****************************************************************/