import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigInteger;
import java.util.*;


public class Template
{
    private static BufferedReader input = new BufferedReader(new InputStreamReader(System.in));
    static String readln() throws IOException
    {
        String line = input.readLine();
        return line;
    }

    public static void main(String[] args) throws IOException
    {
        solution();
    }


    public static void solution() throws IOException {
        String [] arr = readln().split(" ");
        double n = Double.parseDouble(arr[0]);
        double x = Double.parseDouble(arr[1]);
        double y = Double.parseDouble(arr[2]);
        double nec = (y * 0.01) * n;
        double ans = Math.ceil(nec) - x;
        System.out.println((int) ans);
    }
}
