Pair with given sum in a sorted array, md 09 (Jan) Indexes of Subarray Sum. Oct 10, 2025 · First Repeating Element Count Zeros in Sorted Binary Array Floor in a Sorted Array Maximum in Bitonic Array 3. e. Step By Step Implementation: Sort the array in non-decreasing order. You are given an integer target and an array arr[]. It is given that the elements of the arr[] are in sorted order. md 05 (Jan) Count Pairs whose sum is less than target. Explore brute force, hash map, and two-pointer approaches with examples. For example, a given array [10, 20, 5, 2] becomes [2, 5, 10, 20] after sorting in increasing order and becomes [20, 10, 5, 2] after sorting in decreasing order. Time complexity should be minimized. See examples, constraints, hints, and discussion on this medium topic. Jan 22, 2026 · Sub-array with given sum Longest Subarray with Equal 0s and 1s Longest Common Span in Two Binary Arrays Construct an array from its pair-sum array 2 Sum - All Pairs 2 Sum - Distinct Pairs 3 Sum - Find Any 3 Sum - Closest Triplet 4 Sum - Find Any [More problems on 4 Sum in Hard Section] Hard Problems Surpasser Count Trapping Rain Water Top K Jan 20, 2026 · A Sorting Algorithm is used to rearrange a given array or list of elements in an order. md Learn how to implement a data structure that supports queries of finding pairs with a given sum in two sorted arrays. md 07 (Jan) Pair with given sum in a sorted array. md 06 (Jan) Sum Pair closest to target. md 08 (Jan) Count the number of possible triangles. array = 1,3,5,6,10, K = 6, the answer is 1 and 5. Learn how to efficiently find a pair of numbers with a given sum in a sorted array using the Two Pointer technique! 🚀In this video, we tackle a popular codi 5 Given a sorted array of integers, how can we find a pair of integers that sum to K? e. Sorting Algorithms Sorting arranges elements in ascending or descending order. C++ provides built-in sorting using std::sort () from the <algorithm> library, but you can also implement algorithms like Bubble Sort, QuickSort, and MergeSort. Feb 10, 2025 · This article entails C++ and Python programs to find a pair with the given sum in an array using Brute Force, Sorting, and Hashing algorithms. . Note: pairs should have elements of distinct indexes. Then for each element, we compute the required complement (i. Jul 26, 2025 · To check if a pair with a given sum exists in the array, we first sort the array. , target - arr [i]) and perform binary search on the remaining subarray (from index i+1 to end) to find that complement. This approach is demonstrated below in C, Java, and Python: The time complexity of the above solution is O(n2) and doesn’t require any extra space, where nis the size of the input. md 10 (Jan) Count distinct elements in every window. You have to find number of pairs in arr[] which sums up to target. g. Jan 13, 2026 · Find all unique pairs in an array that sum to a target value. &nbsp; Examples 04 (Jan) Count all triplets with given sum in sorted array. A naive solution is to consider every pair in the given array and return if the desired sum is found.


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