@mkrieger1 it supposes to return the indices of the two value in nums that will add up to the target in the form [i,j]

Aug 13, 2012 · Given an integer x and a sorted array a of N distinct integers, design a linear-time algorithm to determine if there exists two distinct indices i and j such that a[i] + a[j] == x

Aug 8, 2013 · The classic 2sum question is simple and well-known: You have an unsorted array, and you are given a value S. Find all pairs of elements in the array that add up to value S. And it's always …

Aug 22, 2020 · This problem is a follow-up of 3Sum. 4Sum and 3Sum are very similar; the difference is that we are looking for unique quadruplets instead of triplets. Following a similar logic, we can …

Apr 4, 2019 · Leetcode #167 is almost same as #1, but why I cannot only add a if condition? Q: Given an array of integers that is already sorted in ascending order, find two numbers such that they add up …

Oct 23, 2021 · In theory (big O complexity), this is the same problem. In practice, you can start building a map where keys are elements, and the value is the set of indices corresponding to this element. …

I'm new to Java and I just started to do Leetcode - Two Sum. I found that except brute force solution, the common solution is using Hashmap. But I still cannot get it. For example, this works in my...

Aug 6, 2017 · How is this 2sum Algorithm O (nlogn)? Asked 9 years, 1 month ago Modified 8 years, 6 months ago Viewed 2k times

Aug 15, 2020 · I'm not sure exactly what you mean about the non-deterministic search, but the main point is the extra checks don't appear to be needed. In fact, as @גלעד ברקן pointed out, they make …

Apr 28, 2014 · This is a generalization of the 2Sum problem Given an unsorted array of numbers, how do you find the pair of numbers with a sum closest to an arbitrary target. Note that an exact match …