Concept of coding

Coding of DS & Algo makes very easy with the help of coding pattern

Below are selected problems segregated based on the patterns. This will help you to understand the pattern and know type of problems where this pattern needs to be applied.

Coding Pattern	Problem	Level	Solution
Warmup	Sqrt	Easy	MyGit
	Reverse Vowel	Easy	MyGit
	Valid Palindrome	Easy	MyGit
	Valid Anagram	Easy	MyGit
	Shortest Word Distance	Easy	MyGit
	Number of Good Pairs	Easy	MyGit
Two Pointers	Pair with Target Sum	Easy	MyGit
	Remove Duplicates	Easy	MyGit
	Squaring a Sorted Array	Easy	MyGit
	Triplet Sum to Zero	Easy	MyGit
	Triplet Sum Close to Target	Medium	MyGit
	Triplets with smaller sum	Medium	MyGit
	Subarrays with Product Less than a Target	Medium	MyGit
	Dutch National Flag Problem	Medium	MyGit
	Quadruple Sum to Target	Medium	MyGit
	Comparing Strings containing Backspaces	Easy	MyGit
	Minimum Window Sort	Medium	MyGit
Island (Matrix Traversal)	Number of Islands	Easy	MyGit
	Biggest Island	Easy	MyGit
	Flood Fill	Easy	MyGit
	Number of Closed Islands	Easy	MyGit
	Island Perimeter	Easy	MyGit
	Number of distinct Island	Medium	MyGit
	Detect cycles in Matrix	Medium	MyGit

Fast and Slow Pointers	LinkedList Cycle	Easy	MyGit
	Start of LinkedList cycle	Medium	MyGit
	Happy Number	Medium	MyGit
	Middle of the LinkedList	Easy	MyGit
	Palindrome LinkedList	Medium	MyGit
	Rearrange of LinkedList	Medium	MyGit
	Cycle in a Circular Array	Hard	MyGit

Sliding Window	Maximum Sum Subarray of Size K	Easy	MyGit
	Smallest Subarray With a Greater Sum	Easy	MyGit
	Longest Substring with K distinct Characters	Medium	MyGit
	Fruits into Baskets	Medium	MyGit
	Longest Substring with same letters after Replacement	Hard	MyGit
	Longest Subarray with Ones after Replacement	Hard	MyGit
	Permutation in a string	Hard	MyGit
	String Anagrams	Hard	MyGit
	Smallest Window containing Substring	Hard	MyGit
	Words Concatenation	Hard	MyGit

Merge Intervals	Merge Intervals	Medium	MyGit
	insert Intervals	Medium	MyGit
	Intervals Intersection	Medium	MyGit
	Conflicting Appointments	Medium	MyGit
	Minimum Meeting Rooms	Medium	MyGit
	Maximum CPU Load	Hard	Similar LeetCode1 , LeetCode2, MyGit
	Employee Free Time	Hard	MyGit

Cyclic Sort	Cyclic Sort	Easy	MyGit
	Find the missing number	Easy	MyGit
	Find all missing numbers	Easy	MyGit
	Find the duplicate number	Easy	MyGit
	Find all duplicate numbers	Easy	MyGit
	Find the corrupt pair	Easy	MyGit
	Find the smallest missing positive number	Medium	MyGit
	Find the first K missing positive numbers	Hard	MyGit

In-Place Reversal of a Linked List	Reverse Linked list	Easy	MyGit
	Reverse a sublist	Medium	MyGit
	Reverse every K-element sub list	Medium	MyGit
	Rotate a linked list	Medium	MyGit
	Reverse alternating K-elements Sub-list	Medium	MyGit

Monotonic Stack	Description		MyGit
	Next Greater Element	Easy	MyGit
	Daily Temperature	Easy	MyGit
	Remove Nodes From Linked List	Easy	MyGit
	Remove All Adjacent Duplicates In String	Easy	MyGit
	Remove All Adjacent Duplicates In String II	Medium	MyGit
	Remove K Digits	Hard	MyGit

Tree Breadth First Search
	Binary Tree level order Traversal	Easy	MyGit
	Binary Tree level order Traversal Reverse	Easy	MyGit
	Zig Zag Traversal	Medium	MyGit
	Level Average in Binary Tree	Easy	MyGit
	Minimum Depth of a Binary Tree	Easy	MyGit
	Level Order Successor	Easy	MyGit
	Connect Level Order Siblings	Medium	MyGit
	Connect All Level Order Siblings	Medium	MyGit
	Right View of Binary Tree	Easy	MyGit
Tree Depth First Search
	Binary tree Path Sum	Easy	MyGit
	All paths for a sum	Medium	MyGit
	Sum of path Numbers	Medium	MyGit
	Path With Given Sequence	Medium	MyGit
	Counts path for a sum	Medium	MyGit
	Tree Diameter	Medium	MyGit
	Path with maximum Sum	Medium	MyGit
Two Heaps Pattern
	Find the Median of a Number Stream	Medium	MyGit
	Sliding Window Median	Hard	GeeksForGeeks
	Maximise Capital	Hard
	Next Interval	Hard

Subsets	Apply BFS approach
	Subsets	Easy	MyGit
	Subsets With Duplicates	Easy	MyGit
	Permutation	Medium	MyGit
	String Permutation by Changing case	Medium	MyGit
	Balanced Parentheses	Hard	MyGit
	Unique Generalised Abbreviations	Hard	MyGit
	Evaluate Expression	Hard	MyGit
	Structurally unique Binary Search Tree	Hard	MyGit
	Count of Structurally Unique Binary Search Tree	Hard	MyGit
Modified Binary Search
	Order agnostic Binary Search	Easy	MyGit
	Ceiling of a number	Medium	GeeksForGeeks, MyGit
	Next Letter	Medium	MyGit
	Number Range	Medium	MyGit
	Search in a Sorted Infinite Array	Medium	MyGit
	Minimum Difference element	Medium	MyGit
	Bitonic Array Maximum	Easy	MyGit
	Search Bitonic Array	Medium	MyGit
	Search in rotated array	Medium	MyGit
	Rotation Count	Medium	MyGit
Top K Elements
	Top K Numbers	Easy	MyGit
	Kth Smallest Number	Easy	MyGit
	K closest points to the origin	Easy	MyGit
	Connect Ropes	Easy	MyGit
	Top K Frequent Numbers	Medium	MyGit
	Frequency Sort	Medium	MyGit
	Kth Largest number in a stream	Medium	MyGit
	K Closest Numbers	Medium	MyGit
	Maximum Distinct Element	Medium	MyGit
	Sum of elements	Medium	MyGit
	Rearrange String	Hard	MyGit
	Rearrange String K distance apart	Hard	MyGit
	Scheduling Tasks	Hard	MyGit
	Frequency Stack	Hard	MyGit
K-Way Merge
	Description
	Merge K Sorted Lists	Medium	MyGit
	Kth Smallest Number in M sorted Lists	Medium	MyGit
	Kth Smallest number in a sorted matrix	Hard	MyGit
	Smallest Number range	Hard	MyGit
	K Pair with Largest Sums	Hard	MyGit
	K Pair with smallest sum	Hard	MyGit
0/1 Knapsack (DP)
	Understanding of DP
	0/1 knapsack	Medium	MyGit
	Equal Subset sum partition	Medium	MyGit
	Subset Sum	Medium	MyGit
	Minimum Subset Sum Difference	Medium	MyGit
	Count of Subset Sum	Hard	MyGit
	Target Sum	Hard	MyGit
Unbounded Knapsack (DP)
	Rod Cutting		MyGit
	Coin Change		MyGit
	Minimum Coin Change		MyGit
	Maximum Ribbon Cut		MyGit
Fibonacci Numbers (DP)
	Fibonacci numbers		MyGit
	Stair case		MyGit
	Number Factors		MyGit
	Minimum Jumps to reach the end		MyGit
	Minimum Jump with Fee		MyGit
	House Thief		MyGit
Longest Common Substring (DP)
	Longest Common Substring		MyGit
	Longest Common Subsequence		MyGit, MyGit
	Minimum Deletion and Insertion to transform a String into another		MyGit
	Longest Increasing Subsequence		MyGit
	Maximum Sum Increasing Subsequence		MyGit
	Shortest Common Super sequence		MyGit, MyGit
	Minimum Deletions to make a sequence sorted		MyGit
	Longest Repeating Subsequence		MyGit
	Subseqence pattern matching		MyGit
	Longest Bitonic Subsequence		MyGit
	Longest Alternating Subsequence		MyGit
	Edit Distance		MyGit
	Strings Interleaving		MyGit
Palindromic Subsequence (DP)
	Longest Palindromic Subsequence		MyGit
	Longest Palindromic substring		MyGit
	Count of palindromic Subsequence		MyGit
	Minimum Deletion in a string to make it a Palindrome		MyGit
	Minimum insertions in a string to make it a palindrome		MyGit
	Find if a string is K-Palindromic		MyGit
	Palindromic Partitioning		MyGit
Backtracking
	Combination Sum	Medium	MyGit
	Word Search	Medium	MyGit
	Sudoku Solver	Medium	MyGit
	Factor Combinations	Medium	MyGit
	Split a string into Max Number of unique Substrings	Medium	GeeksForGeeks, MyGit
Topological Sort
	Tasks Scheduling	Medium	MyGit
	Tasks Scheduling Order	Medim	MyGit
	All Tasks Scheduling Order	Hard	MyGit
	Alien Dictionary	Hard	MyGit
	Reconstructing a sequence	Hard	MyGit
	Minimum Height Tree	Hard	MyGit