using System;
public class Program
{
    static void Main()
    {
		
		//両替
		//1円両替→25円両替　100円両替
		string s = Console.ReadLine();
        long a = long.Parse(s);
        s = Console.ReadLine();
        long b = long.Parse(s);
        s = Console.ReadLine();
        long c = long.Parse(s);
        
		long modX;
		long modY;
		
		b = b + c/25;
		c = c%25;
		
		a = a + b/4;
		b = b % 4;
		
		modX = a/10;
		a = a% 10;
		
			
		Console.WriteLine(a+b+c);
		
		
    }
}