LeetCode Solutions

Useful Links

• LeetCode Problem Set
• My LeetCode Profile

Project Overview

This is just a simple repo for me to put my LeetCode problem solutions into.

All solutions will be completed in C++.

Completed Solutions

Quick table overview of the completed solutions.

#	Problem	Difficulty
1	Two Sum	Easy
2	Add Two Numbers	Medium
3	Longest Substring Without Repeating Characters	Medium
4	Median Of Two Sorted Arrays	Hard
6	Zigzag Conversion	Medium
7	Reverse Integer	Medium
8	String To Integer (atoi)	Medium
9	Palindrome Number	Easy
10	Regular Expression Matching	Hard
12	Integer To Roman	Medium
13	Roman To Integer	Easy
14	Longest Common Prefix	Easy
20	Valid Parentheses	Easy
21	Merge Two Sorted Lists	Easy
26	Remove Duplicates From Sorted Array	Easy
27	Remove Element	Easy
28	Find the Index of the First Occurrence in a String	Easy
42	Trapping Rain Water	Hard
50	Pow(x, n)	Medium
58	Length Of The Last Word	Easy
75	Sort Colors	Medium
78	Subsets	Medium
79	Word Search	Medium
84	Largest Rectangle in Histogram	Hard
85	Maximal Rectangle	Hard
129	Sum Root to Leaf Numbers	Medium
131	Palindrome Partitioning	Medium
140	Word Break II	Hard
165	Compare Version Numbers	Medium
200	Number of Islands	Medium
205	Isomorphic Strings	Easy
237	Delete Node in a Linked List	Medium
260	Single Number III	Medium
310	Minimum Height Trees	Medium
330	Patching Array	Hard
344	Reverse String	Easy
402	Remove K Digits	Medium
404	Sum of Left Leaves	Easy
409	Longest Palindrome	Easy
463	Island Perimeter	Easy
502	IPO	Hard
506	Relative Ranks	Easy
514	Freedom Trial	Hard
523	Continuous Subarray Sum	Medium
552	Student Attendance Record II	Hard
623	Add One Row to Tree	Medium
633	Sum of Square Numbers	Medium
648	Replace Words	Medium
678	Valid Parenthesis String	Medium
752	Open the Lock	Medium
786*	K-th Smallest Prime Fraction	Medium
826	Most Profit Assigning Work	Medium
834	Sum of Distances in Tree	Hard
846	Hands of Straights	Medium
857	Minimum Cost to Hire K Workers	Hard
861	Score after Flipping Matrix	Medium
881	Boats to Save People	Medium
945	Minimum Increment to Make Array Unique	Medium
950	Reveal Cards in Increasing Order	Medium
974	Subarray Sums Divisible by K	Medium
979	Distribute Coins in Binary Tree	Medium
988	Smallest String Starting from Leaf	Medium
995	Minimum Number of K Consecutive Bit Flips	Hard
1002	Find Common Characters	Easy
1038	Binary Search Tree to Greater Sum Tree	Medium
1051	Height Checker	Easy
1052	Grumpy Bookstore Owner	Medium
1122	Relative Sort Array	Easy
1137	Nth Tribonacci Number	Easy
1208	Get Equal Substrings Within Budget	Medium
1219	Path with Maximum Gold	Medium
1248	Count Number of Nice Subarrays	Medium
1249	Minimum Remove to Make Valid Parentheses	Medium
1255	Maximum Score Words Formed by Letters	Hard
1289	Minimum Falling Path Sum II	Hard
1325	Delete Leaves With a Given Value	Medium
1382	Balance a Binary Search Tree	Medium
1404	Number of Steps to Reduce a Number in Binary Representation to One	Medium
1438	Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit	Medium
1442	Count Triplets That Can Form Two Arrays of Equal XOR	Medium
1482	Minimum Number of Days to Make m Bouquets	Medium
1544	Make The String Great	Easy
1545	Find Kth Bit in Nth Binary String	Medium
1550	Three Consecutive Odds	Easy
1552	Magnetic Force Between Two Balls	Medium
1579	Remove Max Number of Edges to Keep Graph Fully Traversable	Hard
1608	Special Array With X Elements Greater Than or Equal X	Easy
1614	Maximum Nesting Depth of the Parentheses	Easy
1700	Number of Students Unable to Eat Lunch	Easy
1791	Find Center of Star Graph	Easy
1863	Sum of All Subset XOR Totals	Easy
1915	Number of Wonderful Substrings	Medium
1971	Find if Path Exists in Graph	Easy
1992	Find All Groups of Farmland	Medium
2000	Reverse Prefix of Word	Easy
2037	Minimum Number of Moves to Seat Everyone	Easy
2073	Time Needed to Buy Tickets	Easy
2192	All Ancestors of a Node in a Directed Acyclic Graph	Medium
2285	Maximum Total Importance of Roads	Medium
2331	Evaluate Boolean Binary Tree	Easy
2370	Longest Ideal Subsequence	Medium
2373	Largest Local Value in a Matrix	Easy
2441	Largest Positive Integer that Exists with its Negative	Easy
2486	Append Characters to String to Make Subsequence	Medium
2487	Remove Node from Linked List	Medium
2597*	The Number of Beautiful Subsets	Medium
2812	Find the Safest Path in a Grid	Medium
2816	Double a Number Represented as a Linked List	Medium
2997	Minimum Number of Operations to Make Array XOR Equal to K	Medium
3068	Find the Maximum Sum of Node Values	Hard
3075	Maximize Happiness of Selected Children	Medium
3110	Score of a String	Easy