Leetcode Solutions

Thanks @Ri-Hong for introducing me to the Leetcode T-shirt
Thanks @Celeste04 and @xuserena12 for dragging me back into Leetcode

Every Kotlin Solution

Because Ri has something against Kotlin

Problem	Solution
Design Parking System	Solution
Design HashSet	Solution
Design Underground System	Solution
Count Negative Numbers in a Sorted Matrix	Solution
Find Smallest Letter Greater Than Target	Solution
Find the Highest Altitude	Solution

Every Racket Solution

Because Ri doesn't like Racket either

Problem	Solution
Pow(x, n)	Solution

Challenges

Little challenge I decided to agree to

Part 1: Math 239

30/30

Count	Problem	Solution
1	Reverse Linked List	Solution
2	Find All Duplicates in an Array	Solution
3	Score of a String	Solution
4	Minimum Rectangles to Cover Points	Solution
5	Sum of Left Leaves	Solution
6	Latest Time You Can Obtain After Replacing Characters	Solution
7	Sum Root to Leaf Numbers	Solution
8	Count the Number of Special Characters I	Solution
9	Count the Number of Special Characters II	Solution
10	Find if Path Exists in Graph	Solution
11	N-th Tribonacci Number	Solution
12	Max Consecutive Ones	Solution
13	Squares of a Sorted Array	Solution
14	Third Maximum Number	Solution
15	Find All Numbers Dsiappeared in An Array	Solution
16	Valid Mountain Array	Solution
17	Find the Integer Added to the Array	Solution
18	Reverse Prefix of Word	Solution
19	Largest Positive Integer That Exists With Its Negative	Solution
20	Compare Version Numbers	Solution
21	Check if Grid Satisfies Conditions	Solution
22	Permutation Difference between Two Strings	Solution
23	Valid Word	Solution
24	Evaluate Boolean Binary Tree	Solution
25	Delete Leaves With a Given Value	Solution
26	Special Array I	Solution
27	Find the XOR of Numbers Which Appear Twice	Solution
28	Find Occurences of an Element in an Array	Solution
29	Find the Number of Good Pairs	Solution
30	String Compression III	Solution

Part 2: CS 240

/42

Count	Problem	Solution
1	Special Array With X Elements Greater Than or Equal X	Solution
2	Single Number III	Solution
3	Reverse String	Solution
4	Minimum Number of Chairs in a Waiting Room	Solution
5	Longest Palindrome	Solution
6	Clear Digits	Solution
7	Find the Child Who Has the Ball After K Seconds	Solution
8	Sort Colors	Solution
9	Minimum Number of Moves to Seat Everyone	Solution
10	Count Pairs That Form a Complete Day I	Solution
11	Sum of Square Numbers	Solution
12	Find Minimum Operations to Make All Elements Divisible by Three	Solution
13	Minimum Average of Smallest and Largest Elements	Solution
14	Find the Minimum Area to Cover All Ones I	Solution
15	Find Center of Star Graph	Solution
16	Maximum Height of a Triangle	Solution
17	Three Consecutive Odds	Solution
18	Merge Nodes in Between Zeros	Solution
19	Average Waiting Time	Solution
20	Crawler Log Folder	Solution
21	Find the Winning Player in Coin Game	Solution
22	Number of Bit Changes to Make Two Integers Equal	Solution
23	Find if Digit Game Can Be Won	Solution
24	Number of Senior Citizens	Solution
25	Find the Number of Winning Players	Solution
26	Make Two Arrays Equal by Reversing Subarrays	Solution
27	Design Neighbor Sum Service	Solution
28	Kth Distinct String in an Array	Solution
29	Minimum Number of Pushes to Type Word II	Solution
30	Snake in Matrix	Solution
31	N-ary Tree Postorder Traversal	Solution
32	Find the Key of the Numbers	Solution
33	Check if Two Chessboard Squares Have the Same Color	Solution
34	Convert 1D Array Into 2D Array	Solution
35	Find the Student that Will Replace the Chalk	Solution
36	Sum of Digit of String After Convert	Solution
37	Find Missing Observations	Solution