import java.util.Scanner;

public class No00000032_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();

		System.out.println((((100 * (l + (25 * (m + (n / 25))) / 100)) % 1000) / 100) + (((25 * (m + (n / 25))) % 100) / 25) + (n % 25));

		scan.close();

	}

}