LeetCode 75

LeetCode 75

Array / String

Problem	Difficulty	Status
Merge Strings Alternately	Easy	Solved
Greatest Common Divisor of Strings	Easy	Solved
Kids With the Greatest Number of Candies	Easy	Solved
Can Place Flowers	Easy	Solved
Reverse Vowels of a String	Easy	Solved
Reverse Words in a String	Medium	Solved
Product of Array Except Self	Medium	Solved
Increasing Triplet Subsequence	Medium	Solved
String Compression	Medium	Solved

Two Pointers

Problem	Difficulty	Status
Move Zeroes	Easy	Solved
Is Subsequence	Easy	Solved
Container With Most Water	Medium	Solved
Max Number of K-Sum Pairs	Medium	Solved

Sliding Window

Problem	Difficulty	Status
Maximum Average Subarray I	Easy	Solved
Maximum Number of Vowels in a Substring of Given Length	Medium	Solved
Max Consecutive Ones III	Medium	Solved
Longest Subarray of 1's After Deleting One Element	Medium	Solved

Prefix Sum

Problem	Difficulty	Status
Find the Highest Altitude	Easy	Solved
Find Pivot Index	Easy	Solved

Hash Map / Set

Problem	Difficulty	Status
Find the Difference of Two Arrays	Easy	Solved
Unique Number of Occurrences	Easy	Solved
Determine if Two Strings Are Close	Medium	Solved
Equal Row and Column Pairs	Medium	Solved

Stack

Problem	Difficulty	Status
Removing Stars From a String	Medium	Solved
Asteroid Collision	Medium	Solved
Decode String	Medium	Solved

Queue

Problem	Difficulty	Status
Number of Recent Calls	Easy	Solved
Dota2 Senate	Medium	Solved

Linked List

Problem	Difficulty	Status
Delete the Middle Node of a Linked List	Medium	Solved
Odd Even Linked List	Medium	Solved
Reverse Linked List	Easy	Solved
Maximum Twin Sum of a Linked List	Medium	Solved

Binary Tree - DFS

Problem	Difficulty	Status
Maximum Depth of Binary Tree	Easy	Solved
Leaf-Similar Trees	Easy	Solved
Count Good Nodes in Binary Tree	Medium	Solved
Path Sum III	Medium	Solved
Longest ZigZag Path in a Binary Tree	Medium	Solved
Lowest Common Ancestor of a Binary Tree	Medium	Solved

Binary Tree - BFS

Problem	Difficulty	Status
Binary Tree Right Side View	Medium
Maximum Level Sum of a Binary Tree	Medium

Binary Search Tree

Problem	Difficulty	Status
Search in a Binary Search Tree	Easy
Delete Node in a BST	Medium

Graphs - DFS

Problem	Difficulty	Status
Keys and Rooms	Medium
Number of Provinces	Medium
Reorder Routes to Make All Paths Lead to the City Zero	Medium
Evaluate Division	Medium

Graphs - BFS

Problem	Difficulty	Status
Nearest Exit from Entrance in Maze	Medium
Rotting Oranges	Medium

Heap / Priority Queue

Problem	Difficulty	Status
Kth Largest Element in an Array	Medium
Smallest Number in Infinite Set	Medium
Maximum Subsequence Score	Medium
Total Cost to Hire K Workers	Medium

Binary Search

Problem	Difficulty	Status
Guess Number Higher or Lower	Easy
Successful Pairs of Spells and Potions	Medium
Find Peak Element	Medium
Koko Eating Bananas	Medium

Backtracking

Problem	Difficulty	Status
Letter Combinations of a Phone Number	Medium
Combination Sum III	Medium

DP - 1D

Problem	Difficulty	Status
N-th Tribonacci Number	Easy
Min Cost Climbing Stairs	Easy
House Robber	Medium
Domino and Tromino Tiling	Medium

DP - Multidimensional

Problem	Difficulty	Status
Unique Paths	Medium
Longest Common Subsequence	Medium
Best Time to Buy and Sell Stock with Transaction Fee	Medium
Edit Distance	Medium

Bit Manipulation

Problem	Difficulty	Status
Counting Bits	Easy
Single Number	Easy
Minimum Flips to Make a OR b Equal to c	Medium

Trie

Problem	Difficulty	Status
Implement Trie (Prefix Tree)	Medium
Search Suggestions System	Medium

Intervals

Problem	Difficulty	Status
Non-overlapping Intervals	Medium
Minimum Number of Arrows to Burst Balloons	Medium

Monotonic Stack

Problem	Difficulty	Status
Daily Temperatures	Medium
Online Stock Span	Medium