import java.util.Scanner;

public class changeMoney {

	public static void main(String[] args) {
		Scanner sn = new Scanner(System.in);
		int h = sn.nextInt();
		int t = sn.nextInt();
		int w = sn.nextInt();
		int count;
		sn.close();

		while (h >= 10 || t >= 4 || w >= 25) {
			if (w >= 25) {
				t += w / 25;
				w = w % 25;
			} else if (t >= 4) {
				h += t / 4;
				t = t % 4;
			} else if (h >= 10) {
				h = h % 10;
			}
		}
		count = h + t + w;
		System.out.println(count);
	}
}