GATE | GATE CS 1997 | Question 52

[5-Marks question]

Let L = {a₁,  a₂, ………., a_n} n ≥ 0 be a list whose Pascal representation is

type list = record
next:↑ list; val: integer   end

The following function returns a list in which a_2i and a_2i-1, 1 ≤ i ≤ [n/2] are interchanged. Complete the function by filling the boxes. Write the line number and the content of the box in your answer sheet.

Answer:

Explanation:

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