
import java.lang.Math;

public class Wizard {
	public static void main (String[] args) {
		
		if (args.length > 0) {
		int n=Integer.parseInt(args[0]);
		int x=Integer.parseInt(args[1]);
		int y=Integer.parseInt(args[2]);
		//System.out.println(n+ "      "+x+"    "+y);
		int result;
		int a= (int) Math.ceil(y*n)/100;
		//System.out.println(a);
		result=a-x;
		if(result < 0)
			System.out.println(0);
		else
		System.out.println(result);
		}
       
    }

}
