
import java.util.Scanner;

public class A {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int x = sc.nextInt();
        int y = sc.nextInt();
        double max = (y*1.0/100)*n;
        max = Math.ceil(max);
        if(y>100)
            System.out.println(x-max<0?max-x:x-max);
        else
            System.out.println(x-max<0?0:x-max);
    }
}
