import java.util.Scanner;

public class Main {
    public static void main(String[] args) {

        Scanner scanner = new Scanner (System.in);
        double n = scanner.nextInt();
        double x = scanner.nextInt();
        double y = scanner.nextInt();

        double ans;
        ans = (n/100)*y - x;
        if (ans - (int)ans == 0) System.out.println((int)ans);
        else System.out.println((int) ans + 1);
    }
}
