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Head of Career Skills Development & Coaching

*Based on past data of successful IK students

Given a target number and a list of numbers, find a triplet of numbers from the list such that the sum of that triplet is the closest to the target. Return that sum.

- 2 + 3 + 2 = 7 is closer to the target than all other triplets.
- 2 + 3 + 3 = 8 is an example of a triplet that we
*cannot*pick because the number 3 appears in the list only once.

There are two triplets that sum up to a number that is 2 away from the target: 11 - 6 + 9 = 14 and 11 - 2 + 9 = 18. No triplets sum up to anything closer than that. Therefore, 14 and 18 are correct outputs.

Constraints:

- -109 <= target <= 109
- -107 <= a number in the list <= 107
- 3 <= size of the given list <= 2*104

*Learn what **Combination Sum** is and how to generate all combinations with sum equal to target problem.*

*Learn how you can find **2 Sum in a Sorted Array** problem.*

*Learn how you can divide two subsequences with equal sums by solving the **Equal Subset Sum Partition Problem**.*

We hope that these solutions to the 3Sum Closest problem will help you level up your Two Pointers technique. Companies such as Amazon, Facebook, Microsoft, LinkedIn, Airbnb, Oracle, etc., include 3Sum Closest interview questions in their tech interviews.

If you are preparing for a tech interview at FAANG or any other Tier-1 tech company, register for Interview Kickstart’s FREE Webinar to understand the best way to prepare.

Interview Kickstart offers interview preparation courses taught by FAANG+ tech leads and seasoned hiring managers. Our programs include a comprehensive curriculum, unmatched teaching methods, FAANG+ instructors, and career coaching to help you nail your next tech interview.

We offer 17 interview preparation courses, each tailored to a specific engineering domain or role, including the most in-demand and highest-paying domains and roles, such as:

- Back-end Engineering Interview Course
- Front-end Engineering Interview Course
- Full Stack Developer Interview Course

To learn more, register for the FREE Webinar.

Note: Input and Output will already be taken care of.

Given a target number and a list of numbers, find a triplet of numbers from the list such that the sum of that triplet is the closest to the target. Return that sum.

- 2 + 3 + 2 = 7 is closer to the target than all other triplets.
- 2 + 3 + 3 = 8 is an example of a triplet that we
*cannot*pick because the number 3 appears in the list only once.

There are two triplets that sum up to a number that is 2 away from the target: 11 - 6 + 9 = 14 and 11 - 2 + 9 = 18. No triplets sum up to anything closer than that. Therefore, 14 and 18 are correct outputs.

Constraints:

- -109 <= target <= 109
- -107 <= a number in the list <= 107
- 3 <= size of the given list <= 2*104

*Learn what **Combination Sum** is and how to generate all combinations with sum equal to target problem.*

*Learn how you can find **2 Sum in a Sorted Array** problem.*

*Learn how you can divide two subsequences with equal sums by solving the **Equal Subset Sum Partition Problem**.*

We hope that these solutions to the 3Sum Closest problem will help you level up your Two Pointers technique. Companies such as Amazon, Facebook, Microsoft, LinkedIn, Airbnb, Oracle, etc., include 3Sum Closest interview questions in their tech interviews.

If you are preparing for a tech interview at FAANG or any other Tier-1 tech company, register for Interview Kickstart’s FREE Webinar to understand the best way to prepare.

Interview Kickstart offers interview preparation courses taught by FAANG+ tech leads and seasoned hiring managers. Our programs include a comprehensive curriculum, unmatched teaching methods, FAANG+ instructors, and career coaching to help you nail your next tech interview.

We offer 17 interview preparation courses, each tailored to a specific engineering domain or role, including the most in-demand and highest-paying domains and roles, such as:

- Back-end Engineering Interview Course
- Front-end Engineering Interview Course
- Full Stack Developer Interview Course

To learn more, register for the FREE Webinar.

**Attend our free webinar to amp up your career and get the salary you deserve.**

Hosted By

Ryan Valles

Founder, Interview Kickstart