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Apr 25, 2022 · One popular question that may be thrown at you in a technical interview is known as the two-sum problem. For example, the two sum has been known to appear in Facebook and Google interviews. It was also the first LeetCode problem that I successfully solved with all test cases passed. Fortunately, my relentless technical interview prep journey ...
Approach (Brute Force) This approach is straightforward. We can check for every pair in the array and if their sum is equal to the given target, print their indices. This kind of Brute Force solution needs to check every possible pair and number of possible pairs in the array = n * (n – 1) / 2. So, in the worst-case, this approach can be slow.
Jun 24, 2024 · Sort the array and take two pointers i and j, one pointer pointing to the start of the array i.e. i = 0 and another pointer pointing to the end of the array i.e. j = n – 1. Greater than the sum then decrement j. Lesser than the sum then increment i. Equals to the sum then count such pairs. Below is the implementation of the above approach: C++
Feb 22, 2022 · Two Sum problem is a classic problem and this has been listed first as one of the basic questions one has to solve when prepping for coding interviews. Leetcode, one of the largest tech communities with hundreds of thousands of active users to participate and solve coding problems listed this as the first problem in their curriculum – the Leetcode TwoSum Problem .
HTML. Interview Preparation. Menu. Back to Explore Page. Given two integers a and b. Find the sum of two numbers without using arithmetic operators.Example 1:Input:a = 5, b = 3Output: 8Explanation :5 + 3 = 8Example 2:Input:a = 10, b = 30Output: 40Explanation:10 + 30.
Menu. Back to Explore Page. Given a Binary Search Tree and a target sum. Check whether there's a pair of Nodes in the BST with value summing up to the target sum. Example 1:Input: 2 / \ 1 3sum = 5Output: 1 Explanati.
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