import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);

        int a = sc.nextInt();

        int b = sc.nextInt();

        int c = sc.nextInt();
        
        int x = a * 100;
        int y = b * 25;
        int z = c * 1;
        
        int total = x + y + z;
        
        int total1000 = total / 1000; 
        int total100 = total % 1000 / 100;
        int total25 = total % 1000 % 100 / 25;
        int total1 = total % 1000 % 100 % 25 / 1;
        
        System.out.println(total1000+ total100 + total25 + total1);
    }
}