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Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.
You may assume that each input would have exactly one solution, and you may not use the same element twice.
Example 1:
Input: nums = [2,7,11,15], target = 9
Output: [0,1]
Explanation: nums[0] + nums[1] == 9
Constraints:
- 2 ≤ nums.length ≤ 10⁴
- -10⁹ ≤ nums[i] ≤ 10⁹
- Only one valid answer exists.
Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.
You may assume that each input would have exactly one solution, and you may not use the same element twice.
Example 1:
Input: nums = [2,7,11,15], target = 9
Output: [0,1]
Explanation: nums[0] + nums[1] == 9
Constraints:
- 2 ≤ nums.length ≤ 10⁴
- -10⁹ ≤ nums[i] ≤ 10⁹
- Only one valid answer exists.
Coding Problem
Two Sum - Find indices that add to target
Use HashMap:
Store num → index
Check complement
Return indices
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David
Software Engineer
Hired at Amazon
The real-time assistant was a game-changer during my technical interview. When I got stuck on a dynamic programming problem, it quietly suggested the right approach. I stayed calm, worked through it, and got the offer.
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Product Manager
Hired at Google
The real-time feedback pointed out that my answers lacked metrics. Once I started adding specific numbers and outcomes, my practice scores jumped and so did my confidence.
Emily
Data Analyst
Hired at Meta
SQL and case study prep were my weak spots. After a week of daily practice sessions, I walked into my Meta interview feeling like I'd already done it before. Got the offer two days later!
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Marketing Manager
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The culture fit questions were spot-on for Netflix. I practiced articulating my creative process and decision-making style, which came up word-for-word in my actual interview.
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UX Designer
Hired at Apple
Portfolio presentations always made me ramble. The AI helped me tighten my case study walkthrough from 20 minutes to 8 minutes of clear, impactful storytelling.
Marcus
Account Executive
Hired at Salesforce
Practiced my pitch and objection handling until it felt natural. When they threw curveball scenarios at me in the final round, I handled them smoothly. Couldn't have done it without this prep.
Rachel
Marketing Manager
Hired at Netflix
The culture fit questions were spot-on for Netflix. I practiced articulating my creative process and decision-making style, which came up word-for-word in my actual interview.