import java.util.Scanner;


public class A_Wizards_and_Demonstration {
public static void main(String[] args) {
    Scanner sc= new Scanner(System.in);
    int n=sc.nextInt();
    int x=sc.nextInt();
    int y=sc.nextInt();
    if((((double)(n*y)/100-x))>0 && (((double)(n*y)/100-x))<=1)
        System.out.println(1);
    else
    System.out.println((((n*y)/100-x)));
}
}
