import java.util.Scanner;
public class No0032 {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int l = sc.nextInt();
		int m = sc.nextInt();
		int n = sc.nextInt();
		System.out.println((n%25) + ((n/25 + m) % 4) + (((n/25 + m) / 4 + l) % 10));
	}
}