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Longest Increasing Subsequence

Medium

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Given an array, find the length of the longest strictly increasing subsequence.

Sample Input:

[10,9,2,5,3,7,101,18]

Sample Output:

Hints

Hint 1

Use patience sorting algorithm with binary search

Hint 2

Maintain tails array where tails[i] is smallest tail of LIS length i+1

Hint 3

For each number, find position in tails using binary search

Code Editor

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