Lexicographically largest array
Detailed guide and Python implementation for the 'Lexicographically largest array' problem.
Problem Statement
Write a function lexicographically_largest(arr, k) that returns the lexicographically largest array that can be obtained by swapping adjacent elements at most k times. Elements in arr are unique.
- •1 <= len(arr) <= 1000
- •0 <= k <= 10^5
- •-10^9 <= arr[i] <= 10^9
Examples
lexicographically_largest([1, 2, 3, 4, 5], 3)
[4, 1, 2, 3, 5]
To get the largest possible element 4 as close to the front as possible, we swap it forward, requiring 3 swaps: [1, 2, 3, 4, 5] -> [1, 2, 4, 3, 5] -> [1, 4, 2, 3, 5] -> [4, 1, 2, 3, 5].
lexicographically_largest([3, 5, 4, 1, 2], 1)
[5, 3, 4, 1, 2]
Swap 3 and 5 (1 swap) to get [5, 3, 4, 1, 2].
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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