import java.util.Scanner;

public class No32 {

    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        int hundred = s.nextInt();
        int quarter = s.nextInt();
        int one = s.nextInt();
        int sum = hundred * 100 + quarter * 25 + one;

        int changedHundred = (sum % 1000) / 100;
        int changedQuarter = ((sum % 1000) % 100) / 25;
        int changedOne = ((sum % 1000) % 100) % 25;
        System.out.println(changedHundred + changedQuarter + changedOne);
    }
}