import java.util.Scanner;

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

		int s = 0, cnt = 0;
		s += sc.nextInt()*100;
		s += sc.nextInt()*25;
		s += sc.nextInt();
		s %= 1000;
		cnt += s/100;
		s %= 100;
		cnt += s/25 + s%25;
		System.out.println(cnt);
	}
}