
import java.math.BigInteger;
import java.util.*;
import java.lang.*;
import java.io.*;

import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */

public class Main {
    public static void main(String[] args) throws Exception {
        // your code goes here
        Scanner sc = new Scanner(System.in);
        double n = sc.nextDouble();
        double x = sc.nextDouble();
        double y = sc.nextDouble();
        double no = n*y/100;

        if(Math.round(no)<no)
            no++;
        if(x>no)
            System.out.println("0");
        else
            System.out.println((int)no-(int)x);


    }
}



