Competitive Coding

🎓 Course Logistics

Sl No	Problem	Solution(s)

Sl No	Problem	Solution(s)
1	Concatenation of Array
2	Running Sum of a 1D Array
3	Build Array from Permutation
4	Find the Highest Altitude
5	Richest Customer Wealth
6	Shuffle the Array
7	Kids With the Greatest Number of Candies
8	Find Numbers with Even Number of Digits
9	Transpose Matrix
10	Matrix Diagonal Sum
11	Flipping an Image

Sl No	Problem	Solution(s)
1	Ceiling of a Number in a Sorted Array
2	Floor of a Number in a Sorted Array
3	Find Smallest Letter Greater Than Target
4	First Bad Version
5	Find First and Last Position of Element in Sorted Array
6	Search Insert Position
7	Fair Candy Swap
8	Check if N and it's Double Exists
9	Intersection of Two Arrays
10	Intersection of Two Arrays II
11	Special Array With X Elements Greater Than or Equal X
12	Count Negative Numbers in a Sorted Matrix
13	Peak Index in a Mountain Array
14	Binary Search
15	Valid Perfect Square
16	Arranging Coins
17	Two Sum II - Input Array is Sorted
18	Find Smallest Letter Greater Than Target
19	Guess Number Higher or Lower
20	Sqrt(x)
21	Kth Missing Positive Number

Sl No	Problem	Solution(s)
1	Defanging an IP Address
2	Shuffle String
3	Goal Parser Interpretation
4	Count Items Matching a Rule
5	Sorting the Sentence
6	Check If Two String Arrays are Equivalent
7	To Lower Case
8	Determine if String Halves are alike
9	Decrypt String from Alphabet to Integer Mapping
10	Number of Strings that Appear as Substrings in word
11	Robot Return to Origin
12	Reverse Words in a String III
13	Excel Sheet Column Title
14	Long Pressed Name
15	Find the Index of the First Occurrence in a String
16	Valid Palindrome
17	Valid Palindrome II
18	Longest Common Prefix
19	Maximum Repeating String
20	Check if Binary String has at most one segment of ones
21	Merge Strings Alternatively
22	Reverse Prefix of Word
23	Valid Parentheses
24	Length of the Last Word

Sl No	Problem	Solution(s)

Sl No	Problem	Solution(s)
1	Convert Binary Number in a Linked List to Integer
2	Reverse Linked List
3	Middle of the Linked List
4	Merge Two Sorted Lists
5	Delete Node in a Linked List
6	Palindrome Linked List
7	Intersection of Two Linked Lists
8	Linked List Cycle
9	Remove Duplicates from Sorted List
10	Find All Numbers Disappeared in an Array
11	Remove Linked List Elements
12	Design Twitter
13	Design Linked List
14	Reverse Linked List II
15	Reorder List
16	Remove Nth Node From End of List
17	Swapping Nodes in a Linked List
18	Add Two Numbers
19	Add Two Numbers II
20	Linked List Cycle II
21	Flatten a Multilevel Doubly Linked List
22	Rotate List
23	Copy List with Random Pointer
24	LRU Cache
25	Remove Duplicates from Sorted List II
26	Design Browser History
27	Partition list
28	Find first node of loop in a linked list
29	Swap Nodes in Pairs
30	Remove Zero Sum Consecutive Nodes from Linked List

Sl No	Problem	Solution(s)
1	Next Greater Element I
2	Valid Parantheses
3	Min Stack
4	Remove Outermost Parentheses
5	Number of Recent Calls
6	Reverse First K elements of Queue
7	Delete Middle Element of a Stack
8	Inorder Traversal(Iterative)
9	Preorder Traversal(Iterative)
10	Flood Fill
11	Implement Queue using Stacks