import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class WizardsAndDemonstrations {
    public static void main(String[] args)throws IOException {
        numOfClones();
    }
    public static void numOfClones()throws IOException{
        BufferedReader reader=new BufferedReader(new InputStreamReader(System.in));
        String[] input=reader.readLine().split(" ");
        double n=Double.parseDouble(input[0]);
        double x=Double.parseDouble(input[1]);
        double y=Double.parseDouble(input[2]);
        double remPeople=(y/100-(x/n))*n;
        if(remPeople>0&&remPeople<1){
            System.out.println(1);
        }
        else {
            System.out.println(remPeople<=0?0:Math.round(remPeople));
        }
    }
}
