import java.util.Scanner;

public class TaskK {
    public static void main(String[] args) {
        Scanner cin = new Scanner(System.in);
        int a = cin.nextInt();
        int b = cin.nextInt();
        int c = cin.nextInt();
        int d = 0;
        b += c / 25;
        c %= 25;
        a += b / 4;
        b %= 4;
        d += a / 10;
        a %= 10;
        System.out.println(a + b + c);
    }
}