How to Solve Missing Number Problem
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Missing Number
Given an array nums containing n distinct numbers in the range [0, n], return the only number in the range that is missing from the array.
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Understanding the Missing Number Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
Given an array nums containing n distinct numbers in the range [0, n], return the only number in the range that is missing from the array.
Missing Number
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How Interview Coder Helps
Get real-time assistance for Missing Number problems during coding interviews. Interview Coder provides instant solutions and explanations.
Examples
nums = [3,0,1]2n = 3 since there are 3 numbers, so all numbers are in the range [0,3]. 2 is the missing number in the range since it does not appear in nums.
nums = [0,1]2n = 2 since there are 2 numbers, so all numbers are in the range [0,2]. 2 is the missing number in the range since it does not appear in nums.
nums = [9,6,4,2,3,5,7,0,1]8n = 9 since there are 9 numbers, so all numbers are in the range [0,9]. 8 is the missing number in the range since it does not appear in nums.
Constraints
n == nums.length1 <= n <= 1040 <= nums[i] <= nAll the numbers of nums are unique.Follow up: Could you implement a solution using only O(1) extra space complexity and O(n) runtime complexity?How Interview Coder Helps with Leetcode Problems
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Frequently Asked Questions
Common questions about solving Missing Number and using Interview Coder during coding interviews.
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