
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        int citizens,wizards;
        float percent;
        int peopleCount;
        float peaopleCountFloat;
        Scanner sc = new Scanner(System.in);
        citizens = sc.nextInt();
        wizards = sc.nextInt();
        percent = sc.nextFloat();

        float percentageFloat = percent/100;



        peopleCount = (int) (percentageFloat*citizens);
        peaopleCountFloat = percentageFloat*citizens;
        if(peaopleCountFloat - wizards < 1 && peaopleCountFloat - wizards > 0)
            peopleCount++;


        peopleCount = peopleCount - wizards;
        if(peopleCount > 0){
            System.out.println(peopleCount);
        }else{
            System.out.println(0);
        }
        //System.out.println("peaple count - wizards : " + (peaopleCountFloat - wizards)+ " Float");


    }
}
