import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
       
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int x=sc.nextInt();
        int y=sc.nextInt();
            System.out.println((n*y)%100!=0?(n*y)/100+1-x:(n*y)/100-x);
    }
}