import java.util.Scanner;

public class Main {
	static void calculate() {

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

		double perst = (y / 100);
		perst = perst * n;
		double rem = perst - ((int) perst);
		int real = (int) perst;
		if (rem != 0) {
			real++;
			int out = real - x;
			System.out.println(out);

		} else {
			int out = real - x;
			System.out.println(out);
		}

	}

	public static void main(String[] args) {
		calculate();
	}

}
