Two sum ii input array is sorted gfg, Intuitions, example walk through, and complexity analysis. e. Using the two-pointer method takes full advantage of the sorted input array and leads to an optimal solution in terms of time and space complexity. Two Sum II - Input Array Is Sorted in Python, Java, C++ and more. Jul 26, 2025 · To check if a pair with a given sum exists in the array, we first sort the array. So, we ought to use a two-pointer approach here. Let these two numbers be numbers[index1] and numbers[index2] where 1 <= index1 < index2 <= numbers. The “Two Sum II – Input Array Is Sorted” problem asks you to find two numbers in a sorted array that add up to a specific target and return their 1-based indices. Return the indices of the two numbers index1 and In-depth solution and explanation for LeetCode 167. Given an array arr [] of integers and another integer target. Contribute to side-quest2001/Leetcode-solutions development by creating an account on GitHub. 167. Two Sum II Input Array Is Sorted - Explanation Problem Link Description Given an array of integers numbers that is sorted in non-decreasing order. find two elements in the array such that their sum is equal to target. Then for each element, we compute the required complement (i. Return the indices of the two numbers, index1 Contribute to SaiTp/LeetCode-Codes development by creating an account on GitHub. , target - arr [i]) and perform binary search on the remaining subarray (from index i+1 to end) to find that complement. Note that index1 and index2 cannot be equal, therefore you may not use the same element twice. length. Better than official and forum solutions. Return the indices (1-indexed) of two numbers, [index1, index2], such that they add up to a given target number target and index1 < index2. Determine if there exist two distinct indices such that the sum of their elements is equal to the target. Nov 13, 2024 · Conclusion The 'Two Sum II - Input Array Is Sorted' problem can be solved with either a brute-force approach or the more efficient two-pointer technique. We need to modify the array in-place and the size of the final array would potentially be smaller than the size of the input array. One, that would keep track of the current element in the original array and another one for just the unique elements. Complete solutions in Python, JavaScript, Java, C++, Go, and C with explanations. There Master Two Sum II with sorted array using two pointers technique. Can you solve this real interview question? Two Sum II - Input Array Is Sorted - Given a 1-indexed array of integers numbers that is already sorted in non-decreasing order, find two numbers such that they add up to a specific target number. Aug 25, 2025 · Given a 1-based indexed integer array arr [] that is sorted in non-decreasing order, along with an integer target. .


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