Triplet Sum In Array Gfg Practice. Contribute to faseehahmed26/GFG development by creating an acc

Contribute to faseehahmed26/GFG development by creating an account on GitHub. Examples: Input : arr [] = [4, 2, 7, 9] Output : 20 Explanation: Here are total 4 Sep 18, 2025 · Triplet Sum (3sum) H Index Triplet with closest sum K most occurring elements Merge Overlapping Intervals Form the Largest Number Sort array of 0s, 1s and 2s K’th Smallest/Largest Inversion Count Minimum Platforms Required Maximum meetings in one room Case-specific Sorting of Strings Sort by Frequency Minimum Operations for Distinct Maximum Can you solve this real interview question? Sort an Array - Given an array of integers nums, sort the array in ascending order and return it. If the current sum matches the target, count all unique combinations while handling duplicates. Nov 5, 2021 · Output: 18 Time complexity: O (nlogn) Space complexity: O (1) Efficient approach: Scan the array and compute the Maximum, second maximum, and third maximum element present in the array and return the sum of its and it would be maximum sum. The simple approach to the above mentioned problem is to generate all the possible triplets and compare each triplet's sum to the given value. cpp Cannot retrieve latest commit at this time. org/co 𝗚𝗲𝘁 After sorting the array, we can fix two numbers and look for the third number that completes the triplet. Note: If there are multiple sums closest to target, print the maximum one. Question:https://practice. Count All Triplets with Given Sum in Sorted Array | GFG 160-Day Challenge Day 51 | GFG POTD🔍 Problem Statement:Given a sorted array and a target sum, find t Given an array arr of integers. * nums [a] + nums [b] + nums [c] + nums [d] == target You may return the answer in any order. org/problems/find-triplets-with-zero-sum/1 Given an array arr [] of n integers. Jul 23, 2025 · The 3-Sum problem is a classic algorithmic problem where the objective is to find all unique triplets in an array that sum up to a specific target value, usually zero. Count all triplets with given sum in sorted array gfg potd today GeeksforGeeks POTD 4th January 2025 Oct 3, 2025 · Given an array prices [] representing stock prices, find the maximum total profit that can be earned by buying and selling the stock any number of times. org/problems/triplet-sum-in-array-1587115621/1#problemoftheday #solutioneasily be solved by two pointer concept Jul 22, 2025 · Given an integer array arr [], find the subarray (containing at least one element) which has the maximum possible sum, and return that sum. . Jan 8, 2025 · Given an array arr [], and an integer target, find all possible unique triplets in the array whose sum is equal to the given target value. Intersection of Two Arrays - Given two integer arrays nums1 and nums2, return an array of their intersection. Using Recursion. Given an array arr[] and an integer target, determine if there exists a triplet in the array whose sum equals the given target. 𝗖𝗵𝗲𝗰𝗸 𝗼𝘂𝘁 𝗼𝘂𝗿 𝗟𝗜𝗩𝗘 𝗮𝗻𝗱 𝗢𝗻𝗹𝗶𝗻𝗲 𝗖𝗼𝘂𝗿𝘀𝗲𝘀- https://practice. Explanation: The triplet {1, 3, 6} in the array sums up to 10. Examples: Input: arr[] = [1, 5, 3, 2] Output: 2 Explanation: There are 2 triplet Build your foundation with core programming skills. Jul 23, 2025 · An Efficient Solution can count triplets in O (n 2) by sorting the array first, and then using method 1 of this post in a loop. We can return triplets in any order, but all the returned triplets should be internally sorted, i. Jul 12, 2025 · Input: arr [] = [3, 2, 7] Output: 0 Explanation: In the given array there are no such triplets such that sum of two numbers is equal to the third number. In a given array, for each element num [i], we calculate the remainder (modulo d) of every possible pair with the elements between indices 0 and i−1, and store these in a hashmap. Return the maximum of product of Maximum, second maximum and third maximum and product of Minimum, second minimum and Maximum element. When to Use Two Pointers: Jul 7, 2023 · Find triplets with zero sum Question: Link: https://practice. Aug 13, 2025 · It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. First sort the array then find whether three numbers are such that the sum of two elements equals the third element. The array can be sorted to increase the algorithm's efficiency. Contribute to nsv671/practice-DSA-GFG development by creating an account on GitHub. Recursion is used in this solution, and the concept is similar to the 0-1 Knapsack problem. Your task is to complete the function find3Numbers () which takes the array arr [], the size of the array (n) and the sum (X) as inputs and returns True if there exists a triplet in the array arr [] which sums up to X and False otherwise. A bigger improvement would be to check berforehand if there are positive and negative values in the triplet. Iterate through the array, treating each element as the first element of a potential triplet. Use two pointers (left and right) to find the other two elements that satisfy the required sum. Jul 23, 2025 · To complement your practice of these essential coding questions, consider enrolling in the DSA to Development - Coding Guide course offered by GeeksforGeeks. GfG-160---160-Days-of-Problem-Solving / 07_Two Pointer Technique / 01_Count all triplets with given sum in sorted array. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions. So, we essentially need to find three numbers x, y, and z such that they add up to the given value. Why checking only 3 consecutive elements will work instead of trying all possible triplets of sorted array? Sep 24, 2025 · Your All-in-One Learning Portal. Note: The sum of any two sides of a triangle must be greater than the third side. Can you solve this real interview question? Permutations - Given an array nums of distinct integers, return all the possible permutations. Each element in the result must be unique and you may return the result in any order. Examples: Input : arr [] = [4, 2, 7, 9] Output : 20 Explanation: Here are total 4 Can you solve this real interview question? 3Sum - Given an integer array nums, return all the triplets [nums[i], nums[j], nums[k]] such that i != j, i != k, and j Given an array arr of integers. e. In this article, we are going to focus on approaches to count triplets. Level up your coding skills and quickly land a job. Feb 12, 2025 · Scan the array and compute the Maximum, second maximum and third maximum element present in the array. Example 1:Input:n = 6, X = 13arr [] Given an array arr, count the number of distinct triplets (a, b, c) such that: a + b = c Each triplet is counted only once, regardless of the order of a and b. Efficient Approach - Using Two-Pointer Technique. Input Format: The first line of input contains an integer T, denoting the number of test cases. Oct 3, 2025 · Given an array of positive integers arr [], count the number of triangles that can be formed with three different array elements as three sides of triangles. You need to find the number of good triplets. You may assume that each input would have exactly one solution, and you may not use the same element twice. Finding triplet sum is a common interview problem that asks us to determine three numbers in an array that sums to the target value. 1) Sort the input array in increasing order. Given an array arr of size n and an integer X. Then, for each element in the array, we check if the pair which makes triplet's sum zero, exists in the hash map or not. Jul 3, 2023 · Your All-in-One Learning Portal. , for any triplet [q1, q2, q3], the condition q1 ≤ q2 ≤ q3 should hold.  Returned triplet should also be The task is to complete the function which returns true if triplets exists in array A whose sum is zero else returns false. Aug 1, 2025 · Given an array arr [] of n integers and an integer target, find the sum of triplets such that the sum is closest to target. Apr 2, 2022 · Given an array arr of size n and an integer X. Note: A subarray is a continuous part of an array. geeksforgeeks. Your task is to complete the function find3Numbers Triplet Sum in an Array | Data Structures & Algorithms | Programming Tutorials | GeeksforGeeks GeeksforGeeks 996K subscribers Subscribed Jul 23, 2025 · Given an array of positive integers, the task is to determine if a Pythagorean triplet exists in the given array. A triplet {a, b, c} is considered a Pythagorean triplet if it satisfies the condition a2 + b2 = c2. Given an integer array arr, return all the unique triplets [arr [i], arr [j], arr [k]] such that i != j, i != k, and j != k, and arr [i] + arr [j] + arr [k] == 0. Examples: Given an array arr, the task is to find the maximum triplet sum in the array. org/problems/ Given an array arr[], find all possible triplets i, j, k in the arr[] whose sum of elements is equals to zero. Hashing-Based Solution - Using HashSet. Jul 23, 2025 · First, we sort the array then we loop once and we will check three consecutive elements of this array if any triplet satisfies arr [i] + arr [i+1] > arr [i+2], then we will output that triplet as our final result. This is the best place to expand your knowledge and get prepared for your next interview. Can you solve this real interview question? Count Good Triplets - Given an array of integers arr, and three integers a, b and c. Example: Input Apr 2, 2022 · Given an array arr of size n and an integer X. We have already discussed, how to check if there is a triplet such that sum of two is equal to the third. Return true if such a triplet exists, otherwise, return false. Practice essential algorithms, data structures, and design patterns for coding interviews. If we fix one of the numbers say x, we are left with the two-sum problem at hand! Java Practice . You can return the answer in any order. Time complexity of this approach is O (n3) which is not sufficient for a larger Jun 10, 2021 · Triplet Sum in Array | Problem of the Day | June 9 2021 | GFG Practice | Hindi sKSama 5. Note: The triplets must be returned in sorted order, the solution vector should also be sorte Jul 23, 2025 · Your All-in-One Learning Portal. Problem link :https://practice. Two Sum - Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. This course provides a structured approach to mastering data structures, algorithms, and key coding concepts, ensuring you're well-prepared for interviews at top product-based companies. Run the inner loop from position i+1 to position n, then the outer loop from start to end. Handling Duplicates: Dec 12, 2022 · Approaches to find all triplets with the given sum in the given array: Method 1: Brute Force Solution We will select each possible triplet and them add them to get their sum if the sum is equal to the target value then we will print that triplet. Note: We can only sell a stock which we have bought earlier and we cannot hold multiple stocks on any day. You must solve the problem without using any built-in functions in O(nlog(n)) time complexity and with the smallest space complexity possible. We use two approaches: a naive method with three nested loops and an optimized method using hashing. org/problems/ Given an array arr, the task is to find the maximum triplet sum in the array. Find if there's a triplet in the array which sums up to the given integer X. 52K subscribers Subscribe Jan 18, 2025 · To find a triplet in an array that sums to a target, various approaches can be used. To do this efficiently, we use a hash map that stores how many times each number appears. Naive Approach. org/prmore Jul 12, 2025 · Input: arr [] = [3, 2, 7] Output: 0 Explanation: In the given array there are no such triplets such that sum of two numbers is equal to the third number. Given an array arr, count the number of distinct triplets (a, b, c) such that: a + b = c Each triplet is counted only once, regardless of the order of a and b. Given a sorted array arr[] and a target value, the task is to count triplets (i, j, k) of valid indices, such that arr[i] + arr[j] + arr[k] = target and i < j < k. Your Task: You don't need to read input or print anything. Can you solve this real interview question? 4Sum - Given an array nums of n integers, return an array of all the unique quadruplets [nums [a], nums [b], nums [c], nums [d]] such that: * 0 <= a, b, c, d < n * a, b, c, and d are distinct. Jun 5, 2020 · The easiest: you do not have to check the range as the range-2 is the total option of triplets. Example 1:Input:n = 6, X = 13arr [] Apr 23, 2024 · All possible triplets are:- 2 3 4 => sum = 9 2 5 9 => sum = 16 2 3 9 => sum = 14 3 4 9 => sum = 16 1 4 9 => sum = 14 Maximum sum = 16 Simple Approach is to traverse for every triplet with three nested 'for loops' and find update the sum of all triplets one by one. Given an array arr[] of integers, determine whether it contains a triplet whose sum equals zero. To select all three possible pairs we will have to use nested loops. Your task is to complete the function find3Numbers Can you solve this real interview question? Subarray Sums Divisible by K - Given an integer array nums and an integer k, return the number of non-empty subarrays that have a sum divisible by k. For each item, we either consider the current number or leave it out and repeat for the remaining numbers. The Two-pointer Technique is used in this effective approach for triplet sum in array. Find triplets with zero sum - Geeks for Geeks https://practice. Examples: Input: arr[] = [1, 5, 3, 2] Output: 2 Explanation: There are 2 triplet Given an array Arr[] of N distinct integers and a range from L to R, the task is to count the number of triplets having a sum in the range [L, R]. Explanation: The only possible triplet sums up to 0. The naive approach generates all possible triplets and checks if their sum equals the target, with a time complexity of O (n^3). Jul 12, 2024 · Your All-in-One Learning Portal. A subarray is a contiguous part of an array. Aug 8, 2021 · Triplet Sum in Array gfg | Find if there's a triplet in array which sums up to the given integer X. May 11, 2024 · Approach: For a number d to divide the sum of a triplet, the sum of their remainders (mod d) must also be divisible by d. Scan the array and compute Minimum and second minimum element present in the array. Example 1: Input: nums = [5,2,3,1] Output: [1,2,3,5] Explanation: After sorting the array, the positions of Sep 15, 2025 · Two pointers is really an easy and effective technique that is typically used for Two Sum in Sorted Arrays, Closest Two Sum, Three Sum, Four Sum, Trapping Rain Water and many other popular interview questions. Example: Input POTD - 04/11/2024 | Find All Triplets with Zero Sum | Problem of the Day | GeeksforGeeks Practice GeeksforGeeks Practice • 328 views 2 months ago Given an array arr[] of integers, determine whether it contains a triplet whose sum equals zero. Oct 20, 2024 · [Expected Approach] Using Hashing – O (n^3) time and O (n^2) space The idea is to store sum of all the pairs with their indices in the hash map or dictionary. Jul 23, 2025 · Find the closest pair from two sorted arrays Find the pair in array whose sum is closest to x Find all triplets with zero sum Find a triplet that sum to a given value Find a triplet such that sum of two equals to third element Find four elements that sum to a given value Please refer complete article on Two Pointers Technique for more details! Triplet Sum in an Array | Data Structures & Algorithms | Programming Tutorials | GeeksforGeeks GeeksforGeeks 996K subscribers Subscribed POTD - 04/11/2024 | Find All Triplets with Zero Sum | Problem of the Day | GeeksforGeeks Practice GeeksforGeeks Practice • 328 views 2 months ago Solve one problem based on Data Structures and Algorithms every day and win exciting prizes. Check whether it contains a triplet that sums … Jan 4, 2025 · Given an array, the task is to find all triplets whose sum is zero.

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