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Problem 2172. Delete the rows in the middle

Created by Mehmet OZC

We will delete the rows in the middle and keep the first and the last rows.

For example if input is

 [1 2
  1 7
  1 8
  1 6
  1 5]

then output will be

 [1 2
  1 5]

keeping the first and the last rows. However there will be more than one row index and that makes this question challenging.

Note: Elements of input row index is always greater than or equal to 2.

Related Challenge - Problem 2084. Sum Rows

Problem Group

Solution Statistics

20 correct solutions 24 incorrect solutions
Last solution submitted on Nov 19, 2014

Problem Comments