#include<bits/stdc++.h>
using namespace std;
int main(){
	int q;
	float x,y,z,w;
	cin>>x>>y>>z;
	q=x+y+z;
	w=(x+y+z)/3;
	printf("%d\n%.1f",q,w);
}
/**************************************************************
	Problem: 1602
	User: tonghuatao
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/