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

import static java.lang.Math.*;
import static java.util.Arrays.*;

public class Wizards {
	public static void main(String[] args) throws IOException {
	  Scanner s = new Scanner(System.in);
		
	  //READ----------------------------------------------------
    int n = s.nextInt(), x = s.nextInt(), y = s.nextInt();
    
		//SOLVE----------------------------------------------------
		long res = 0;
		
		Double a = (y/100.0)*n - x;
		
		res = a.intValue();
		
		if(a>res)
		  res++;
		
    //CLOSE----------------------------------------------------
    System.out.println(res);
    s.close();
	}
}