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g1601_1700.s1673_find_the_most_competitive_subsequence.readme.md Maven / Gradle / Ivy

1673\. Find the Most Competitive Subsequence

Medium

Given an integer array `nums` and a positive integer `k`, return _the most **competitive** subsequence of_ `nums` _of size_ `k`.

An array's subsequence is a resulting sequence obtained by erasing some (possibly zero) elements from the array.

We define that a subsequence `a` is more **competitive** than a subsequence `b` (of the same length) if in the first position where `a` and `b` differ, subsequence `a` has a number **less** than the corresponding number in `b`. For example, `[1,3,4]` is more competitive than `[1,3,5]` because the first position they differ is at the final number, and `4` is less than `5`.

**Example 1:**

**Input:** nums = [3,5,2,6], k = 2

**Output:** [2,6]

**Explanation:** Among the set of every possible subsequence: {[3,5], [3,2], [3,6], [5,2], [5,6], [2,6]}, [2,6] is the most competitive.

**Example 2:**

**Input:** nums = [2,4,3,3,5,4,9,6], k = 4

**Output:** [2,3,3,4]

**Constraints:**

*   1 <= nums.length <= 105
*   0 <= nums[i] <= 109
*   `1 <= k <= nums.length`