1.
  +----+---------+---------+---------+---------+---------+
  |  n |  2000000|  4000000|  6000000|  8000000| 10000000|
  +----+---------+---------+---------+---------+---------+
  |time|         |         |         |         |         |
  +----+---------+---------+---------+---------+---------+

  2.
  +----+---------+---------+---------+---------+---------+
  |  n |     2000|     4000|     6000|     8000|    10000|
  +----+---------+---------+---------+---------+---------+
  |time|         |         |         |         |         |
  +----+---------+---------+---------+---------+---------+

  3.
  +----+---------+---------+---------+---------+---------+
  |  n |      100|      200|      300|      400|      500|
  +----+---------+---------+---------+---------+---------+
  |time|         |         |         |         |         |
  +----+---------+---------+---------+---------+---------+

  4.
  +----+---------+---------+---------+---------+---------+
  |  n |     2000|     4000|     6000|     8000|    10000|
  +----+---------+---------+---------+---------+---------+
  |time|         |         |         |         |         |
  +----+---------+---------+---------+---------+---------+


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