/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
 
  public static void main(String[] args)
  {
    System.out.println(minMoves(0, 1, 0, 11));
  }
 
  public static int minMoves(int pos, int steps, int move, int N)
  {
    if (Math.abs(pos) > N)
      return Integer.MAX_VALUE;
    if (Math.abs(pos) == N)
      return move;
    int j = minMoves(pos - steps, steps + 1, move + 1, N);
    int i = minMoves(pos + steps, steps + 1, move + 1, N);
    return Math.min(i, j);
  }
}

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