	

    import java.awt.Point;
import java.io.*;
import java.math.BigInteger;
import java.util.*;

import static java.lang.Math.*;
     
    public class Solution implements Runnable {
     
            BufferedReader in;
            PrintWriter out;
            StringTokenizer tok = new StringTokenizer("");
     
            public static void main(String[] args) {
                    new Thread(null, new Solution(), "", 256 * (1L << 20)).start();
            }
     
            public void run() {
                    try {
                            long t1 = System.currentTimeMillis();
                            if (System.getProperty("ONLINE_JUDGE") != null) {
                                    in = new BufferedReader(new InputStreamReader(System.in));
                                    out = new PrintWriter(System.out);
                            } else {
                                    in = new BufferedReader(new FileReader("input.txt"));
                                    //out = new PrintWriter("output.txt");
                                    out = new PrintWriter(System.out);
                            }
                            Locale.setDefault(Locale.US);
                            solve();
                            in.close();
                            out.close();
                            long t2 = System.currentTimeMillis();
                            System.err.println("Time = " + (t2 - t1));
                    } catch (Throwable t) {
                            t.printStackTrace(System.err);
                            System.exit(-1);
                    }
            }
     
            String readString() throws IOException {
                    while (!tok.hasMoreTokens()) {
                            tok = new StringTokenizer(in.readLine());
                    }
                    return tok.nextToken();
            }
     
            int readInt() throws IOException {
                    return Integer.parseInt(readString());
            }
     
            long readLong() throws IOException {
                    return Long.parseLong(readString());
            }
     
            double readDouble() throws IOException {
                    return Double.parseDouble(readString());
            }
     
            // solution
     
            void solve() throws IOException {
            	int n = readInt(), x = readInt(), y = readInt();
            	
            	int answer = y * n / 100 - x;
            	answer--;
            	if(answer < 0) answer = 0;
            	while( (x+answer)*100 < y * n) answer++;
            	out.println(answer);            	
            }
    }

