---
title: "#136-single-number articles | Hashnode"
description: "Explore 2 articles tagged #136-single-number on Hashnode. Tutorials, guides, and how-tos from the community."
url: "https://hashnode.com/tag/136-single-number"
---

Tag

# #136-single-number

2 posts · 0 followers

[Adiam Ahmed](https://hashnode.com/@AdiamAhmed) · [May 13, 2025](https://hashnode.com/posts/single-number/6823a6b95b0742494dbfba86)

### [Single Number](https://adiamvsleetcode.hashnode.dev/single-number?utm_source=hashnode&utm_medium=feed)

Solving ‘Single Number’ the Easy Way (Before It Gets Too Deep)

6 min read · [adiamvsleetcode.hashnode.dev](https://adiamvsleetcode.hashnode.dev/single-number?utm_source=hashnode&utm_medium=feed)

[Han](https://hashnode.com/@EunHaSu) · [May 9, 2023](https://hashnode.com/posts/136-single-number-problem-solved-uncover-the-most-efficient-java-algorithm/645a491cd9b707733435dcc9)

### [136. Single Number Problem Solved: Uncover the Most Efficient Java Algorithm](https://eunhanlee.hashnode.dev/136-single-number-problem-solved-uncover-the-most-efficient-java-algorithm?utm_source=hashnode&utm_medium=feed)

Problem Problem\_Link Problem Solving Approach Find the single number in an array with a linear runtime complexity of O(n) and use only constant extra space with a complexity of O(1). One possible approach is to use a hash map to keep track of the f...

2 min read · [eunhanlee.hashnode.dev](https://eunhanlee.hashnode.dev/136-single-number-problem-solved-uncover-the-most-efficient-java-algorithm?utm_source=hashnode&utm_medium=feed)