import java.io.BufferedReader;
import java.io.InputStreamReader;


public class WizardsandDemonstration {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception{
		
		BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(System.in));
		
		String input=bufferedReader.readLine();
		
		String[] splits=input.split(" ");
		int n=Integer.valueOf(splits[0]),x=Integer.valueOf(splits[1]),y=Integer.valueOf(splits[2]);
		
		int ans = (int)Math.ceil((float)((n*y)/100.00)) - x ;
		
		System.out.println(Math.abs(ans));

	}

}
