#include <iostream>
#include <iomanip>
 
int main() {
    int x, y, z;
    
    std::cin >> x >> y >> z;
 
    
    int totalScore = x + y + z;
 
    
    double averageScore = static_cast<double>(totalScore) / 3;
 
    
    std::cout << totalScore << std::endl;
 
  
    std::cout << std::fixed << std::setprecision(1) << averageScore << std::endl;
 
    return 0;
}
/**************************************************************
	Problem: 1602
	User: lihean
	Language: C++
	Result: Accepted
	Time:9 ms
	Memory:2072 kb
****************************************************************/