import java.util.*;
import java.io.*;
public class A168
{ public static final PrintStream out=System.out; 
public static void main(String[] args)
{ Scanner in=new Scanner(System.in);
int n=in.nextInt(),x=in.nextInt(),y=in.nextInt();
int p =(int)Math.ceil((double)(n*(y/100.0)));
int clones=Math.abs(p-x);
out.println(clones);
}
}