Explore

Miscellaneous

🧠 Hash Table & Map — Recommended Order

Two Sum —

https://leetcode.com/problems/two-sum/⁠

⁠

Group Anagrams —

https://leetcode.com/problems/group-anagrams/⁠

⁠

Valid Anagram —

https://leetcode.com/problems/valid-anagram/⁠

⁠

Intersection of Two Arrays —

https://leetcode.com/problems/intersection-of-two-arrays/⁠

⁠

Happy Number —

https://leetcode.com/problems/happy-number/⁠

⁠

First Unique Character in a String —

https://leetcode.com/problems/first-unique-character-in-a-string/⁠

⁠

Contains Duplicate —

https://leetcode.com/problems/contains-duplicate/⁠

⁠

Single Number —

https://leetcode.com/problems/single-number/⁠

⁠

Isomorphic Strings —

https://leetcode.com/problems/isomorphic-strings/⁠

⁠

Word Pattern —

https://leetcode.com/problems/word-pattern/⁠

⁠

Longest Consecutive Sequence —

https://leetcode.com/problems/longest-consecutive-sequence/⁠

⁠

Subarray Sum Equals K —

https://leetcode.com/problems/subarray-sum-equals-k/⁠

⁠

Longest Substring Without Repeating Characters —

https://leetcode.com/problems/longest-substring-without-repeating-characters/⁠

⁠

Top K Frequent Elements —

https://leetcode.com/problems/top-k-frequent-elements/⁠

⁠

Find All Anagrams in a String —

https://leetcode.com/problems/find-all-anagrams-in-a-string/⁠

⁠

Minimum Window Substring —

https://leetcode.com/problems/minimum-window-substring/⁠

⁠

Four Sum II —

https://leetcode.com/problems/4sum-ii/⁠

⁠

Ransom Note —

https://leetcode.com/problems/ransom-note/⁠

⁠

Jewels and Stones —

https://leetcode.com/problems/jewels-and-stones/⁠

⁠

Count the Number of Consistent Strings —

https://leetcode.com/problems/count-the-number-of-consistent-strings/⁠

⁠

🔺 Heap / Priority Queue — Recommended Practice Order

Kth Largest Element in an Array —

https://leetcode.com/problems/kth-largest-element-in-an-array/⁠

⁠

Top K Frequent Elements —

https://leetcode.com/problems/top-k-frequent-elements/⁠

⁠

Last Stone Weight —

https://leetcode.com/problems/last-stone-weight/⁠

⁠

Merge k Sorted Lists —

https://leetcode.com/problems/merge-k-sorted-lists/⁠

⁠

Find Median from Data Stream —

https://leetcode.com/problems/find-median-from-data-stream/⁠

⁠

K Closest Points to Origin —

https://leetcode.com/problems/k-closest-points-to-origin/⁠

⁠

Reorganize String —

https://leetcode.com/problems/reorganize-string/⁠

⁠

Task Scheduler —

https://leetcode.com/problems/task-scheduler/⁠

⁠

Design Twitter —

https://leetcode.com/problems/design-twitter/⁠

⁠

Minimum Number of Refueling Stops —

https://leetcode.com/problems/minimum-number-of-refueling-stops/⁠

⁠

Swim in Rising Water —

https://leetcode.com/problems/swim-in-rising-water/⁠

⁠

Trapping Rain Water II —

https://leetcode.com/problems/trapping-rain-water-ii/⁠

⁠

The Skyline Problem —

https://leetcode.com/problems/the-skyline-problem/⁠

⁠

IPO (Initial Public Offering) —

https://leetcode.com/problems/ipo/⁠

⁠

Smallest Range Covering Elements from K Lists —

https://leetcode.com/problems/smallest-range-covering-elements-from-k-lists/⁠

⁠

⚡ Bit Manipulation — Recommended Practice Order

Single Number —

https://leetcode.com/problems/single-number/⁠

⁠

Number of 1 Bits —

https://leetcode.com/problems/number-of-1-bits/⁠

⁠

Power of Two —

https://leetcode.com/problems/power-of-two/⁠

⁠

Reverse Bits —

https://leetcode.com/problems/reverse-bits/⁠

⁠

Missing Number —

https://leetcode.com/problems/missing-number/⁠

⁠

Sum of Two Integers —

https://leetcode.com/problems/sum-of-two-integers/⁠

⁠

Counting Bits —

https://leetcode.com/problems/counting-bits/⁠

⁠

Bitwise AND of Numbers Range —

https://leetcode.com/problems/bitwise-and-of-numbers-range/⁠

⁠

Single Number II —

https://leetcode.com/problems/single-number-ii/⁠

⁠

Single Number III —

https://leetcode.com/problems/single-number-iii/⁠

⁠

Complement of Base 10 Integer —

https://leetcode.com/problems/complement-of-base-10-integer/⁠

⁠

Maximum Product of Word Lengths —

https://leetcode.com/problems/maximum-product-of-word-lengths/⁠

⁠

Total Hamming Distance —

https://leetcode.com/problems/total-hamming-distance/⁠

⁠

Find XOR Sum of All Pairs Bitwise AND —

https://leetcode.com/problems/find-xor-sum-of-all-pairs-bitwise-and/⁠

⁠

Bitwise ORs of Subarrays —

https://leetcode.com/problems/bitwise-ors-of-subarrays/⁠

⁠

Minimum XOR Sum of Two Arrays —

https://leetcode.com/problems/minimum-xor-sum-of-two-arrays/⁠

⁠

Maximum XOR of Two Numbers in an Array —

https://leetcode.com/problems/maximum-xor-of-two-numbers-in-an-array/⁠

⁠

Find the Duplicate Number (Binary/Bit based approach) —

https://leetcode.com/problems/find-the-duplicate-number/⁠

⁠

Decode XORed Array —

https://leetcode.com/problems/decode-xored-array/⁠

⁠

XOR Queries of a Subarray —

https://leetcode.com/problems/xor-queries-of-a-subarray/⁠

⁠

Want to print your doc?
This is not the way.

Try clicking the ⋯ next to your doc name or using a keyboard shortcut (

CtrlP

) instead.