import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;

public class Main {
    public static void main(String... args) throws IOException {
        try (BufferedReader reader = new BufferedReader(new InputStreamReader(System.in))) {
            int[] a = reader.lines().limit(3).mapToInt(Integer::parseInt).toArray();
            int sum = (100 * a[0] + 25 * a[1] + a[2]) % 1000;
            int count = sum / 100;
            sum %= 100;
            count += sum / 25;
            System.out.println(count + sum % 25);
        }
    }
}