#include<bits/stdc++.h> 
using namespace std;
int x,y,z,i;
int main(){
     cin>>x>>y>>z;
     i=z+x+y;
     printf("%d\n%.1f",i,i/3.0);
}
/**************************************************************
	Problem: 1602
	User: chenyichuen
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/