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Missing Number

easy Solve on LeetCode

Last edited: August 19, 2025

Problem
Examples
Solution
Video explanation
Method 1 - Using Sorting + linear search
Code
Complexity
Method 2 - Using Sorting + Binary Search
Code
Complexity
Method 3 - Counting Sort
Method 4 - Using Hashset
Code
Complexity
Method 5 - Using Arithmetic Sum
Method 6 - Using Arithmetic sum + Gaussian formula
Code
Complexity
Method 7 - Using Arithmetic sum but avoid overflow
Code
Complexity
Method 8 - Using XOR Operator
Approach
Code
Complexity

video explanation

Related Tags

binary-search bit-manipulation bits hash-table leetcode math maths missing video consecutive ranged-array array-algo array-1-n

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Two Number Missing in Range 1 to NMedium

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