LeetCode System Design Interview Services

Leetcode System Design Interview Services

LeetCode 75

Essential coding problems for technical interview preparation.

75Array / String

1894. Merge Strings Alternately

1146. Greatest Common Divisor of Strings

1528. Kids With the Greatest Number of Candies

605. Can Place Flowers

345. Reverse Vowels of a String

151. Reverse Words in a String

238. Product of Array Except Self

334. Increasing Triplet Subsequence

443. String Compression

75Two Pointers

283. Move Zeroes

392. Is Subsequence

11. Container With Most Water

1798. Max Number of K-Sum Pairs

75Sliding Window

643. Maximum Average Subarray I

1567. Maximum Number of Vowels in a Substring of Given Length

1046. Max Consecutive Ones III

1586. Longest Subarray of 1's After Deleting One Element

75Prefix Sum

1833. Find the Highest Altitude

724. Find Pivot Index

75Hash Map / Set

1392. Find the Difference of Two Arrays

1319. Unique Number of Occurrences

1777. Determine if Two Strings Are Close

2428. Equal Row and Column Pairs

75Stack

2470. Removing Stars From a String

735. Asteroid Collision

394. Decode String

75Queue

969. Number of Recent Calls

649. Dota2 Senate

75Linked List

2216. Delete the Middle Node of a Linked List

328. Odd Even Linked List

206. Reverse Linked List

2236. Maximum Twin Sum of a Linked List

75Binary Tree - DFS

104. Maximum Depth of Binary Tree

904. Leaf-Similar Trees

1544. Count Good Nodes in Binary Tree

437. Path Sum III

1474. Longest ZigZag Path in a Binary Tree

236. Lowest Common Ancestor of a Binary Tree

75Binary Tree - BFS

199. Binary Tree Right Side View

1116. Maximum Level Sum of a Binary Tree

75Binary Search Tree

783. Search in a Binary Search Tree

450. Delete Node in a BST

75Graphs - DFS

871. Keys and Rooms

547. Number of Provinces

1576. Reorder Routes to Make All Paths Lead to the City Zero

399. Evaluate Division

75Graphs - BFS

2038. Nearest Exit from Entrance in Maze

1036. Rotting Oranges

75Heap / Priority Queue

215. Kth Largest Element in an Array

2413. Smallest Number in Infinite Set

2636. Maximum Subsequence Score

2553. Total Cost to Hire K Workers

75Binary Search

374. Guess Number Higher or Lower

2392. Successful Pairs of Spells and Potions

162. Find Peak Element

907. Koko Eating Bananas

75Backtracking

17. Letter Combinations of a Phone Number

216. Combination Sum III

75DP - 1D

1236. N-th Tribonacci Number

747. Min Cost Climbing Stairs

198. House Robber

806. Domino and Tromino Tiling

75DP - Multidimensional

62. Unique Paths

1250. Longest Common Subsequence

714. Best Time to Buy and Sell Stock with Transaction Fee

72. Edit Distance

75Bit Manipulation

338. Counting Bits

136. Single Number

1441. Minimum Flips to Make a OR b Equal to c

75Trie

208. Implement Trie (Prefix Tree)

1397. Search Suggestions System

75Intervals

435. Non-overlapping Intervals

452. Minimum Number of Arrows to Burst Balloons

75Monotonic Stack

739. Daily Temperatures

937. Online Stock Span

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