import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.io.StreamTokenizer;
import java.util.Arrays;
import java.util.Scanner;

/**
 * Created by IntelliJ IDEA.
 * User: Mirza
 * Date: 25.03.12
 * Time: 18:51
 * To change this template use File | Settings | File Templates.
 */
public class main {
        static Scanner in; static int next() throws Exception {return in.nextInt();};
    //static StreamTokenizer in; static int next() throws Exception {in.nextToken(); return (int) in.nval;}
    //  static BufferedReader in;
    static PrintWriter out;

    public static void main(String[] args) throws Exception {
        in = new Scanner(System.in);
//      in = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
//      in = new BufferedReader(new InputStreamReader(System.in));
        float n,x,y;
        int dol,klo;
        n = next();
        x = next();
        y = next();
        if((n/100*y)-(int)(n/100*y)>0) dol = (int)(n/100*y)+1;
        else dol = (int)(n/100*y);

        out = new PrintWriter(System.out);
        if(n==x) out.print(0);
        else out.print(dol-(int)x);
        out.close();

    }
}