First Missing Positive - Given an unsorted integer array nums. Return the smallest positive integer that is not present in nums. You must implement an algorithm that runs in O (n) time and uses …

In-depth solution and explanation for LeetCode 41. First Missing Positive in Python, Java, C++ and more. Intuitions, example walk through, and complexity analysis. Better than official and …

class Solution: def firstMissingPositive(self, nums: list[int]) -> int: n = len(nums) # Correct slot: # nums [i] = i + 1 # nums [i] - 1 = i # nums [nums [i] - 1] = nums [i] for i in range(n): while nums[i] …

Dec 26, 2022 · In this problem, you must find the first missing positive integer in a given array of integers. Follow our clear and concise explanation to understand the approach and code for …

Jan 10, 2016 · Given an unsorted integer array nums, return the smallest missing positive integer. You must implement an algorithm that runs in O(n) time and uses O(1) auxiliary space.

Iterates through the sorted list and finds the first missing positive integer by comparing each element with the current expected positive integer (res). Increments res until a missing positive …

class Solution: def firstMissingPositive(self, nums: List[int]) -> int: n = len(nums) # Get rid of any non-positives. for i in range(n): if nums[i] <= 0: nums[i] = n + 1 # Fill holes where we can. i = 0 …

First Missing Positive Leetcode Problem : Given an unsorted integer array nums, return the smallest missing positive integer. You must implement an algorithm that runs in O (n) time and …

Mar 10, 2022 · Given an unsorted integer array nums, return the smallest missing positive integer. You must implement an algorithm that runs in O (n) time and uses constant extra space. We …

Jan 2, 2021 · The solution should be linear time and constant space. Yours is N Log N. The optimal solution for that is to utilize the fact that the number would be between 1 and N+1, so …