//No.32 貯金箱の憂鬱
//http://yukicoder.me/problems/5
//20170418 0930

package no32;

import java.util.Scanner;

public class Chr002 {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int[] Kouka = new int[]{1, 25, 100};
		int Shihei = 1000;
		int in1, in25, in100;
		int sum;
		
		in100 = scan.nextInt();
		in25 = scan.nextInt();
		in1 = scan.nextInt();

		scan.close();
		
		sum = in1 * Kouka[0] + in25 * Kouka[1] + in100 * Kouka[2];
		
		sum = sum % Shihei;

		in100 = sum / Kouka[2];
		sum = sum % Kouka[2];
		
		in25 = sum / Kouka[1];
		sum = sum % Kouka[1];

		in1 = sum;

		System.out.println(in100 + in25+ in1);
		
		
	}

}