#include <bits/stdc++.h>
using namespace std;
int main(){
     int x,y,z,o;
     cin>>x>>y>>z;
     o=x+z+y;
     float p;
     p=(x+z+y)/3.0;
     cout<<o<<endl;
     printf("%.1f",p);
}

/**************************************************************
	Problem: 1602
	User: huangluowei
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/