You are given two integers n and x. You have to construct an array of positive integers nums of size n where for every 0 <= i < n - 1, nums[i + 1] is greater than nums[i], and the result of the bitwise AND operation between all elements of nums is x.
Return the minimum possible value of nums[n - 1].
\n
Example 1:
\n\nInput: n = 3, x = 4
\n\nOutput: 6
\n\nExplanation:
\n\nnums can be [4,5,6] and its last element is 6.
Example 2:
\n\nInput: n = 2, x = 7
\n\nOutput: 15
\n\nExplanation:
\n\nnums can be [7,15] and its last element is 15.
\n
Constraints:
\n\n1 <= n, x <= 108x and v where v = 0, 1, 2, …(n - 1).",
"To merge x with another number v, keep the set bits of x untouched, for all the other bits, fill the set bits of v from right to left in order one by one.",
"So the final answer is the “merge” of x and n - 1."
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