import java.io.*;
import java.util.*;

public class A implements Runnable {

	BufferedReader br;
	StringTokenizer st;
	PrintWriter out;

	String nextToken() throws IOException {
		while (!st.hasMoreTokens()) {
			st = new StringTokenizer(br.readLine());
		}
		return st.nextToken();
	}

	int nextInt() throws IOException {
		return Integer.parseInt(nextToken());
	}

	String nextStr() throws IOException {
		return nextToken();
	}

	char nextChar() throws IOException {
		return nextToken().charAt(0);
	}

	long nextLong() throws IOException {
		return Long.parseLong(nextToken());
	}

	double nextDouble() throws IOException {
		return Double.parseDouble(nextToken());
	}

	public void solve() throws IOException {
		int n = nextInt();
		int x = nextInt();
		int y = nextInt();
		
		int stoK = n*y - 100*x;
		int res = stoK/100;
		if ( stoK - res*100 != 0 )
			++res;
		out.println( res );
		
	}

	public void run() {
		try {
			br = new BufferedReader(new InputStreamReader(System.in));
			out = new PrintWriter(new OutputStreamWriter(System.out));
			st = new StringTokenizer("");
			solve();
		} catch (Exception e) {
			e.printStackTrace();
			System.exit(1);
		} finally {
			out.close();
		}
	}

	public static void main(String[] args) {
		new Thread(new A()).start();
	}
}