import java.io.*;
import java.util.Arrays;
import java.util.List;
import java.util.StringTokenizer;


public class Contest168Problem0 implements Runnable {

    void solve() throws NumberFormatException, IOException {
        int n = nextInt(), x = nextInt(), y = nextInt();

        int all = (int) Math.ceil(0.01f * n * y);
        if (all - x > 0){
            out.print(all-x);
        } else {
            out.print(0);
        }



    }


    StringTokenizer st;

    BufferedReader in;

    PrintWriter out;


    public static void main(String[] args) {

        new Thread(new Contest168Problem0()).start();
    }


    public void run() {

        try {
            if (System.getProperty("ONLINE_JUDGE") != null) {
                in = new BufferedReader(new InputStreamReader(System.in));
            } else {
                in = new BufferedReader(new FileReader("input.txt"));
            }

            out = new PrintWriter(System.out);


            solve();


        } catch (Exception e) {

            e.printStackTrace();
            System.out.print(e);
            System.exit(9000);


        } finally {


            out.flush();

            out.close();

        }

    }

    //Получаем следующий токен

    String nextToken() throws IOException {

        while (st == null || !st.hasMoreTokens()) {

            st = new StringTokenizer(in.readLine());

        }

        return st.nextToken();

    }


    int nextInt() throws NumberFormatException, IOException {

        return Integer.parseInt(nextToken());

    }


    long nextLong() throws NumberFormatException, IOException {

        return Long.parseLong(nextToken());

    }


    double nextDouble() throws NumberFormatException, IOException {

        return Double.parseDouble(nextToken());

    }


}
