/*
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 * and open the template in the editor.
 */


import java.util.Scanner;

/**
 *
 * @author dave
 */
public class Main 
{
    public static void main(String g[])
    {
        Scanner sc = new Scanner(System.in);
        
        int n=Integer.parseInt(sc.next());
        int x=Integer.parseInt(sc.next());
        int y=Integer.parseInt(sc.next());;
        
        int ans= (int) Math.ceil(0.01*y*(n)-x);
        System.out.println(ans);
        
        
    }
    
}
