Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in C++

Two Sum

Explore how to identify two indices in an array whose values add up to a target number without reusing the same index. Understand the problem constraints and implement an optimal O(n) time solution. This lesson strengthens your ability to recognize and solve the Two Sum pattern commonly tested in coding interviews.

We'll cover the following...

Statement

For the given array of integers arr and a target t, you have to identify the two indices that add up to generate the target t. Moreover, you can’t use the same index twice, and there will be only one solution.

Note: We will assume that the array is zero-indexed and the output order doesn’t matter.

Constraints:

  • 2≤2 \leq arr.length ≤103\leq 10^3
...