import java.util.Scanner;


public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int x = sc.nextInt();
		int y = sc.nextInt();
		
		int puppets = ((n*y) - x*100 +99)/100;
		
		System.out.println(puppets);
	}

}
		 	 	  		   	 						 	 	  				