import java.util.Scanner;

public class Test {

	public static void main(String[] args) {

		Scanner input = new Scanner(System.in);

		double n = input.nextDouble();
		double x = input.nextDouble();
		double y = input.nextDouble();
		double h = n / 100 * y;

		if ((h - x) % 1 == 0) {
			System.out.println((int)(h - x));
		}

		else {
			System.out.println((int)(h - x) + 1);
		}
	}
}