import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;


public class CF168A
{
	public static void main(String[] args) throws Exception
	{
		BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
		StringTokenizer st = new StringTokenizer(in.readLine());
		int n = Integer.parseInt(st.nextToken()), x = Integer.parseInt(st.nextToken()), y = Integer.parseInt(st.nextToken());
		System.out.println((n*y + 99)/100 - x);
	}
}
