LeetCode 75

LeetCode's official study plan. 75 problems across 20+ topics from basics to advanced. Great for structured preparation.

Azhar Khan75 problems22 Easy53 Med0 Hard

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Title	Solution	Practice	Difficulty	Companies	Topics
739. Daily Temperatures	Solution	Solve	Medium	-	Array Monotonic Stack+1
1318. Minimum Flips to Make a OR b Equal to c	Solution	Solve	Medium	-	Bit Manipulation
1268. Search Suggestions System	Solution	Solve	Medium	-	Array Binary Search+4
901. Online Stock Span	Solution	Solve	Medium	-	Data Stream Design+2
435. Non-overlapping Intervals	Solution	Solve	Medium	-	Array Dynamic Programming+2
208. Implement Trie (Prefix Tree)	Solution	Solve	Medium	-	Design Hash Table+2
452. Minimum Number of Arrows to Burst Balloons	Solution	Solve	Medium	-	Array Greedy+1
1071. Greatest Common Divisor of Strings	Solution	Solve	Easy	-	Math String
1372. Longest ZigZag Path in a Binary Tree	Solution	Solve	Medium	-	Binary Tree Depth-First Search+2
1207. Unique Number of Occurrences	Solution	Solve	Easy	-	Array Hash Table
1161. Maximum Level Sum of a Binary Tree	Solution	Solve	Medium	-	Binary Tree Breadth-First Search+2
1143. Longest Common Subsequence	Solution	Solve	Medium	-	Dynamic Programming String
1137. N-th Tribonacci Number	Solution	Solve	Easy	-	Dynamic Programming Math+1
1431. Kids With the Greatest Number of Candies	Solution	Solve	Easy	-	Array
1004. Max Consecutive Ones III	Solution	Solve	Medium	-	Array Binary Search+2
994. Rotting Oranges	Solution	Solve	Medium	-	Array Breadth-First Search+1
933. Number of Recent Calls	Solution	Solve	Easy	-	Data Stream Design+1
875. Koko Eating Bananas	Solution	Solve	Medium	-	Array Binary Search
872. Leaf-Similar Trees	Solution	Solve	Easy	-	Binary Tree Depth-First Search+1
841. Keys and Rooms	Solution	Solve	Medium	-	Breadth-First Search Depth-First Search+1
790. Domino and Tromino Tiling	Solution	Solve	Medium	-	Dynamic Programming
1926. Nearest Exit from Entrance in Maze	Solution	Solve	Medium	-	Array Breadth-First Search+1
2542. Maximum Subsequence Score	Solution	Solve	Medium	-	Array Greedy+2
2462. Total Cost to Hire K Workers	Solution	Solve	Medium	-	Array Heap (Priority Queue)+2
2390. Removing Stars From a String	Solution	Solve	Medium	-	Simulation Stack+1
2352. Equal Row and Column Pairs	Solution	Solve	Medium	-	Array Hash Table+2
2336. Smallest Number in Infinite Set	Solution	Solve	Medium	-	Design Hash Table+2
2300. Successful Pairs of Spells and Potions	Solution	Solve	Medium	-	Array Binary Search+2
2215. Find the Difference of Two Arrays	Solution	Solve	Easy	-	Array Hash Table
2130. Maximum Twin Sum of a Linked List	Solution	Solve	Medium	-	Linked List Stack+1
2095. Delete the Middle Node of a Linked List	Solution	Solve	Medium	-	Linked List Two Pointers
735. Asteroid Collision	Solution	Solve	Medium	-	Array Simulation+1
1768. Merge Strings Alternately	Solution	Solve	Easy	-	String Two Pointers
1732. Find the Highest Altitude	Solution	Solve	Easy	-	Array Prefix Sum
1679. Max Number of K-Sum Pairs	Solution	Solve	Medium	-	Array Hash Table+2
1657. Determine if Two Strings Are Close	Solution	Solve	Medium	-	Counting Hash Table+2
1493. Longest Subarray of 1's After Deleting One Element	Solution	Solve	Medium	-	Array Dynamic Programming+1
1466. Reorder Routes to Make All Paths Lead to the City Zero	Solution	Solve	Medium	-	Breadth-First Search Depth-First Search+1
1456. Maximum Number of Vowels in a Substring of Given Length	Solution	Solve	Medium	-	Sliding Window String
1448. Count Good Nodes in Binary Tree	Solution	Solve	Medium	-	Binary Tree Breadth-First Search+2
199. Binary Tree Right Side View	Solution	Solve	Medium	-	Binary Tree Breadth-First Search+2
334. Increasing Triplet Subsequence	Solution	Solve	Medium	-	Array Greedy
328. Odd Even Linked List	Solution	Solve	Medium	-	Linked List
283. Move Zeroes	Solution	Solve	Easy	-	Array Two Pointers
238. Product of Array Except Self	Solution	Solve	Medium	-	Array Prefix Sum
236. Lowest Common Ancestor of a Binary Tree	Solution	Solve	Medium	-	Binary Tree Depth-First Search+1
216. Combination Sum III	Solution	Solve	Medium	-	Array Backtracking
215. Kth Largest Element in an Array	Solution	Solve	Medium	-	Array Divide and Conquer+3
206. Reverse Linked List	Solution	Solve	Easy	-	Linked List Recursion
338. Counting Bits	Solution	Solve	Easy	-	Bit Manipulation Dynamic Programming
198. House Robber	Solution	Solve	Medium	-	Array Dynamic Programming
162. Find Peak Element	Solution	Solve	Medium	-	Array Binary Search
151. Reverse Words in a String	Solution	Solve	Medium	-	String Two Pointers
136. Single Number	Solution	Solve	Easy	-	Array Bit Manipulation
104. Maximum Depth of Binary Tree	Solution	Solve	Easy	-	Binary Tree Breadth-First Search+2
72. Edit Distance	Solution	Solve	Medium	-	Dynamic Programming String
62. Unique Paths	Solution	Solve	Medium	-	Combinatorics Dynamic Programming+1
17. Letter Combinations of a Phone Number	Solution	Solve	Medium	-	Backtracking Hash Table+1
450. Delete Node in a BST	Solution	Solve	Medium	-	Binary Search Tree Binary Tree+1
11. Container With Most Water	Solution	Solve	Medium	-	Array Greedy+1
724. Find Pivot Index	Solution	Solve	Easy	-	Array Prefix Sum
714. Best Time to Buy and Sell Stock with Transaction Fee	Solution	Solve	Medium	-	Array Dynamic Programming+1
700. Search in a Binary Search Tree	Solution	Solve	Easy	-	Binary Search Tree Binary Tree+1
649. Dota2 Senate	Solution	Solve	Medium	-	Greedy Queue+1
643. Maximum Average Subarray I	Solution	Solve	Easy	-	Array Sliding Window
605. Can Place Flowers	Solution	Solve	Easy	-	Array Greedy
547. Number of Provinces	Solution	Solve	Medium	-	Breadth-First Search Depth-First Search+2
746. Min Cost Climbing Stairs	Solution	Solve	Easy	-	Array Dynamic Programming
443. String Compression	Solution	Solve	Medium	-	String Two Pointers
437. Path Sum III	Solution	Solve	Medium	-	Binary Tree Depth-First Search+1
399. Evaluate Division	Solution	Solve	Medium	-	Array Breadth-First Search+5
394. Decode String	Solution	Solve	Medium	-	Recursion Stack+1
392. Is Subsequence	Solution	Solve	Easy	-	Dynamic Programming String+1
374. Guess Number Higher or Lower	Solution	Solve	Easy	-	Binary Search Interactive
345. Reverse Vowels of a String	Solution	Solve	Easy	-	String Two Pointers