import java.util.*;
public class WizardsMeeting{
	public static void main (String args[]){
		Scanner scnr = new Scanner(System.in);
		int n=scnr.nextInt();
		int x=scnr.nextInt();
		int y=scnr.nextInt();
		int answer=0;
		while ((x+answer)/n<y/100) answer++;
		
		System.out.println(answer);
	}
}