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Learn how to find the only missing number in an array of distinct numbers in the range [0, n] using O (1) extra space and O (n) runtime. See examples, explanations and code for this real interview question on LeetCode.
- Solution
Solution - Missing Number - LeetCode
- Submissions
Submissions - Missing Number - LeetCode
- Discuss (999+)
Discuss (999+) - Missing Number - LeetCode
- Find Missing and Repeated Values
2965. Find Missing and Repeated Values. Easy. You are given...
- Solution
Learn how to solve the 268. Missing Number problem of Leetcode using C++ and Python. The problem is to find the only number in the range [0, n] that is missing from an array of n distinct numbers.
- Problem Statement
- Example
- Approach
- Complexity Analysis For Missing Number LeetCode Solution
The Missing Number LeetCode Solution – “Missing Number” states that given an array of size n containing n distinct numbers between [0,n]. We need to return the number which is missingin the range.
Explanation: 1. We can easily observe that all the numbers between [0,3] are present except the number 2. 2. Hence, 2 is the missing numberin the range [0,3]. Explanation: 1. All the numbers except 8, are present in the array for the range [0,9]. 2. Hence, 8 is the missing numberin the range [0,9].
Idea:
1. There are multiple ways to solve this problem efficiently but, here we’ll discuss O(N) time and O(1) Space solution using Bit Manipulation. 2. Let xo be the bitwise xor of all the numbers in the range [0,9] and all the elements of the input array. We can easily observe that all the elements except the missing number(frequency = 1) will have the frequency as 2. 3. Also, we know that the bitwise xor of the number with itself is always zero. So, all elements having a frequency of 2, will yiel...
Time Complexity
The time complexity of the above code is O(n)since we run the loop exactly n times where n = size of the input array.
Space Complexity
The space complexity of the above code is O(1)since we’re using constant space. Reference: https://en.wikipedia.org/wiki/Bit_manipulation
A 2D integer matrix problem where you need to find the repeating and missing numbers in the range [1, n2]. See examples, constraints and test results for this easy interview question.
Find the missing number in a sorted array of integers. The solution uses binary search to check if the target number is in the array or not.
Missing Number | Live Coding with Explanation | Leetcode - 268. Solved using XOR and Gauss's formula in Constant Space O (1) and O (N) time complexity. Get Discount on GeeksforGeeks courses...
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- Algorithms Made Easy
Missing Number. Easy. 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. Follow up: Could you implement a solution using only O(1) extra space complexity and O(n) runtime complexity? Example 1: Input: nums = [3,0,1] Output: 2.
