Leetcode 18 4sum Two Pointers Net Worth 2026: Salary, Income & Wealth

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Welcome to Algo Ducky! In this video, we tackle

Rule: Given a list of integers and a target value, find all possible combinations of elements in the list that sum up to the target.

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a + b + c + d == target Core Idea: This problem is an extension of: 2Sum 3Sum We: Sort the array Fix first

Given an array nums of n integers and an integer target, are there elements a, b, c, and d in nums such that a + b + c + d = target?

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Leetcode 18