import java.util.*;
import java.lang.Math;

public class HelloWorld{

     public static void main(String []args){
        Scanner in = new Scanner(System.in);
        float n, x, y, z, output;
        boolean loop = false;
            System.out.println("Enter the values you want for n, x, y");
            String input = in.nextLine();
            String[] items = input.split(" ");
            //if (items.length() > 3 ){
            //    loop = true;
            //}
            //else{
                loop = false;
                n = Float.parseFloat(items[0]);
                x = Float.parseFloat(items[1]);
                y = Float.parseFloat(items[2]);
                z = (y * n)/100;
                if (x > z){
                    output = 0;
                }
                else{
                    output = (float) Math.ceil(z-x);
                }
                System.out.println(output);
            //}

     }
}

 			  	  	 			  	  	  	   	  	