import java.util.Scanner;

public class A {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int x = sc.nextInt();
		int y = sc.nextInt();
		sc.nextLine();
		int out = (int) Math.ceil(y * n / 100.0);
		System.out.println(out - x);
	}

}
