
import java.util.Scanner;


public class main {

    
    public static void main(String[] args) {
        float l,r,k,b,c,d,t,e=0,a;
        Scanner in=new Scanner(System.in);
        a=in.nextFloat();
        b=in.nextFloat();
        c=in.nextFloat();
        
        float x= (float) (c/100.00);
        float y=x*a;
       // System.out.println(x);
       // System.out.println(y);
        if(y%2!=0)
        {
            System.out.println((int)Math.abs(y+1-b));
        }
        else
        {
            System.out.println((int)Math.abs(y-b));
        }
        
    }
    
}
