import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int l = scan.nextInt();
        int m = scan.nextInt();
        int n = scan.nextInt();
        int m1, m25, m100, m1000;
        m25 = n / 25;
        m1 = n % 25;
        m100 = (m + m25) / 4;
        m25 = (m + m25) % 4;
        m1000 = (l + m100) / 10;
        m100 = (l + m100) % 10;
        System.out.println(m1 + m25 + m100);
        scan.close();
    }
}