import java.util.*;
public class MyClass {
    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 k=(y*0.01*n);
      if(k>=x+0.1&&k<=x+0.9)
      k=k+1;
      if(k-x<0)
      System.out.println(0);
      else
      System.out.format("%.0f",k-x);
    }
}