import java.util.*;

public class StringAppendTest1 {

  public static void main(String[] args) throws Exception {
    
    int n = Integer.parseInt(args[0]);

    StringBuilder sb = new StringBuilder("a");

    for(int i = 0; i < n; i++) sb.append("a");

    String s = sb.toString();

    System.out.println("length(s) = " + s.length());
  }
}

/* Better:

StringAppendTest1 10000   -> 0.139 seconds
StringAppendTest1 100000  -> 0.154 seconds
StringAppendTest1 1000000 -> 0.190 seconds
    
*/