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Problem 1: K Most Frequent Elements
Resources:
Coding Platform: Leetcode - Top K Frequent Elements
Problem 2: Find Median from Data Stream
Resources:
Coding Platform: Leetcode - Find Median from Data Stream
Problem 1: Number of Distinct Substrings in a String
Resources:
Coding Platform: Coding Ninjas - Number of Distinct Substrings
Problem 2: Power Set
Resources:
Coding Platform: GeeksforGeeks - Power Set
Problem 1: Implement Trie (Prefix Tree)
Resources:
Coding Platform: Leetcode - Implement Trie (Prefix Tree)
Problem 2: Longest String with All Prefixes
Resources:
Coding Platform: Coding Ninjas - Longest String with All Prefixes
Problem 1: Longest Common Substring | (DP - 27)
Resources:
Coding Platform: Practice Here
Problem 2: Longest Palindromic Subsequence | (DP - 28)
Resources:
Coding Platform: Practice Here
Problem 1: Unbounded Knapsack (DP - 23)
Resources:
Coding Platform: Practice Here
Problem 2: Print Longest Common Subsequence (DP - 26)
Resources:
Coding Platform: Practice Here
Problem 1: Longest Happy Prefix
Resources:
Coding Platform: Leetcode - Longest Happy Prefix
Problem 2: Count Palindromic Subsequences in a Given String
Resources:
Coding Platform: GeeksforGeeks - Count Palindromic Subsequences
Problem 1: KMP Algorithm / LPS (pi) Array
Resources:
Coding Platform: Leetcode - Implement strstr()
Problem 2: Shortest Palindrome
Resources:
Coding Platform: Leetcode - Shortest Palindrome
Problem 1: Rabin-Karp Algorithm
Resources:
Coding Platform: Leetcode - Repeated String Match (Rabin-Karp Discussion)
Problem 2: Z-Function
Resources:
Coding Platform: Leetcode - Implement strstr()
Problem 1: Minimum Number of Bracket Reversals Needed to Make an Expression Balanced
Resources:
Coding Platform: Leetcode - Minimum Add to Make Parentheses Valid
Problem 2: Count and Say
Resources:
Coding Platform: Leetcode - Count and Say
Problem 1: Maximum XOR of Two Numbers in an Array
Resources:
Coding Platform: Leetcode - Maximum XOR of Two Numbers in an Array
Problem 2: Maximum XOR With an Element From Array
Resources:
Coding Platform: Leetcode - Maximum XOR With an Element From Array
Problem 1: Number of Distinct Substrings in a String
Resources:
Coding Platform: Practice Problem
Problem 2: Bit Prerequisites for Trie Problems
Resources:
Coding Platform: Practice Problem
Problem 1: Implement Trie | INSERT | SEARCH | STARTSWITH
Resources:
Coding Platform: Leetcode - Implement Trie (Prefix Tree)
Problem 2: Longest String with All Prefixes
Resources:
Coding Platform: Practice Problem
Problem 1: Maximum Rectangle Area with All 1's | (DP-55)
Resources:
Coding Platform: Leetcode - Maximal Rectangle
Problem 2: Count Square Submatrices with All Ones | (DP-56)
Resources:
Coding Platform: Leetcode - Count Square Submatrices with All Ones
Problem 1: Palindrome Partitioning - II | (DP-53)
Resources:
Coding Platform: Leetcode - Palindrome Partitioning II
Problem 2: Partition Array for Maximum Sum | (DP-54)
Resources:
Coding Platform: Leetcode - Partition Array for Maximum Sum
Problem 1: Matrix Chain Multiplication | (DP-48)
Resources:
Coding Platform: GFG - Matrix Chain Multiplication
Problem 2: Evaluate Boolean Expression to True | (DP-52)
Resources:
Coding Platform: Leetcode - Parsing a Boolean Expression
Problem 1: Longest Increasing Subsequence | (DP-41)
Resources:
Coding Platform: Leetcode - Longest Increasing Subsequence
Problem 2: Largest Divisible Subset | (DP-44)
Resources:
Coding Platform: Leetcode - Largest Divisible Subset
Problem 1: Best Time to Buy and Sell Stock | (DP-35)
Resources:
Coding Platform: Leetcode - Best Time to Buy and Sell Stock
Problem 2: Buy and Sell Stocks With Cooldown | (DP-39)
Resources:
Coding Platform: Leetcode - Best Time to Buy and Sell Stock with Cooldown
Problem 1: Distinct Subsequences | (DP-32)
Resources:
Coding Platform: Leetcode - Distinct Subsequences
Problem 2: Wildcard Matching | (DP-34)
Resources:
Coding Platform: Leetcode - Wildcard Matching
Problem 1: Longest Common Subsequence (DP - 25)
Resources:
Coding Platform: Leetcode - Longest Common Subsequence
Problem 2: Minimum Insertions to Make a String Palindrome (DP - 29)
Resources:
Coding Platform: Leetcode - Minimum Insertion Steps to Make a String Palindrome
Problem 1: Coin Change 2 (DP - 22)
Resources:
Coding Platform: Leetcode - Coin Change 2
Problem 2: Rod Cutting Problem (DP - 24)
Resources:
Coding Platform: GeeksforGeeks - Rod Cutting Problem
Problem 1: Count Partitions with Given Difference
Resources:
Coding Platform: Practice Here
Problem 2: Assign Cookies
Resources:
Coding Platform: Practice Here
Problem 1: Partition Set Into 2 Subsets With Min Absolute Sum Diff
Resources:
Coding Platform: Practice Here
Problem 2: Count Subsets with Sum K
Resources:
Coding Platform: Practice Here
Problem 1: Subset Sum Equal to Target (DP 14)
Resources:
Coding Platform: Practice Here
Problem 2: Partition Equal Subset Sum (DP 15)
Resources:
Coding Platform: Practice Here
Problem 1: Minimum/Maximum Falling Path Sum (DP 12)
Resources:
Coding Platform: Practice Here
Problem 2: 3-D DP: Ninja and His Friends (DP 13)
Resources:
Coding Platform: Practice Here
Problem 1: Minimum Path Sum in Grid (DP 10)
Resources:
Coding Platform: Practice Here
Problem 2: Minimum Path Sum in Triangular Grid (DP 11)
Resources:
Coding Platform: Practice Here
Problem 1: Grid Unique Paths (DP 8)
Resources:
Coding Platform: Practice Here
Problem 2: Grid Unique Paths 2 (DP 9)
Resources:
Coding Platform: Practice Here
Problem 1: Maximum Sum of Non-Adjacent Elements (DP 5)
Resources:
Coding Platform: Practice Here
Problem 2: House Robber II (DP 6)
Resources:
Coding Platform: Practice Here
Problem 3: Ninja's Training (DP 7)
Resources:
Coding Platform: Practice Here
Problem 1: Climbing Stairs
Resources:
Coding Platform: Practice Here
Problem 2: Frog Jump (DP-3)
Resources:
Coding Platform: Practice Here
Problem 3: Frog Jump with K Distances (DP-4)
Resources:
Coding Platform: Practice Here
Problem 1: Number of Islands II
Resources:
Coding Platform: Practice Here
Problem 2: Making a Large Island
Resources:
Coding Platform: Practice Here
Problem 3: Swim in Rising Water
Resources:
Coding Platform: Practice Here
Problem 1: Number of Operations to Make Network Connected
Resources:
Coding Platform: Practice Here
Problem 2: Most Stones Removed with Same Rows or Columns
Resources:
Coding Platform: Practice Here
Problem 3: Accounts Merge
Resources:
Coding Platform: Practice Here
Problem 1: Minimum Spanning Tree
Resources:
Coding Platform: Practice Here
Problem 2: Prim's Algorithm
Resources:
Coding Platform: Practice Here
Problem 3: Kruskal's Algorithm
Resources:
Coding Platform: Practice Here
Problem 1: Bellman-Ford Algorithm
Resources:
Coding Platform: Practice Here
Problem 2: Floyd-Warshall Algorithm
Resources:
Coding Platform: Practice Here
Problem 3: Find the City with the Smallest Number of Neighbors in a Threshold Distance
Resources:
Coding Platform: Practice Here
Problem 1: Network Delay Time
Resources:
Coding Platform: Practice Here
Problem 2: Number of Ways to Arrive at Destination
Resources:
Coding Platform: Practice Here
Problem 1: Shortest Path in a Binary Maze
Resources:
Coding Platform: Practice Here
Problem 2: Path with Minimum Effort
Resources:
Coding Platform: Practice Here
Problem 1: Shortest Path in UG with Unit Weights
Resources:
Coding Platform: Practice Here
Problem 2: Shortest Path in DAG
Resources:
Coding Platform: Practice Here
Problem 1: Course Schedule I
Resources:
Coding Platform: Leetcode - Course Schedule
Problem 2: Course Schedule II
Resources:
Coding Platform: Leetcode - Course Schedule II
Problem 1: Bipartite Graph (DFS)
Resources:
Coding Platform: Leetcode - Is Graph Bipartite?
Problem 2: Cycle Detection in Directed Graph (DFS)
Resources:
Coding Platform: Leetcode - Course Schedule II (Cycle Detection)
Problem 1: Word Ladder - I
Resources:
Coding Platform: Leetcode - Word Ladder
Problem 2: Word Ladder - II
Resources:
Coding Platform: Leetcode - Word Ladder II
Problem 1: 0/1 Matrix (BFS Problem)
Resources:
Coding Platform: Leetcode - 0/1 Matrix
Problem 2: Surrounded Regions (DFS Problem)
Resources:
Coding Platform: Leetcode - Surrounded Regions
Problem 1: Flood Fill
Resources:
Coding Platform: Leetcode - Flood Fill
Problem 2: Cycle Detection in Undirected Graph (BFS)
Resources:
Coding Platform: GeeksforGeeks - Detect Cycle in an Undirected Graph
Problem 1: Number of Provinces
Resources:
Coding Platform: Leetcode - Number of Provinces
Problem 2: Connected Components Problem in Matrix
Resources:
Coding Platform: Coding Practice - Connected Components
Problem 1: Two Sum in BST | Check if There Exists a Pair with Sum K
Resources:
Coding Platform: Leetcode - Two Sum IV - Input is a BST
Problem 2: Recover BST | Correct BST with Two Nodes Swapped
Resources:
Coding Platform: Leetcode - Recover Binary Search Tree
Problem 1: Construct a BST from a Preorder Traversal
Resources:
Coding Platform: Leetcode - Construct Binary Search Tree from Preorder Traversal
Problem 2: Inorder Successor/Predecessor in BST
Resources:
Coding Platform: Leetcode - Inorder Successor in BST
Problem 1: Find K-th Smallest/Largest Element in BST
Resources:
Coding Platform: Leetcode - Kth Smallest Element in a BST
Problem 2: Check if a Tree is a BST or BT
Resources:
Coding Platform: Leetcode - Validate Binary Search Tree
Problem 1: Ceil in a Binary Search Tree
Resources:
Coding Platform: GeeksforGeeks - Implementing Ceil in BST
Problem 2: Insert a Node in Binary Search Tree
Resources:
Coding Platform: Leetcode - Insert into a Binary Search Tree
Problem 1: Morris Preorder Traversal of a Binary Tree
Resources:
Coding Platform: Leetcode - Binary Tree Inorder Traversal
Problem 2: Morris Inorder Traversal of a Binary Tree
Resources:
Coding Platform: Leetcode - Binary Tree Inorder Traversal
Problem 3: Flatten Binary Tree to LinkedList
Resources:
Coding Platform: Leetcode - Flatten Binary Tree to Linked List
Problem 1: Construct Binary Tree from Inorder and Preorder Traversal
Resources:
Coding Platform: Leetcode - Construct Binary Tree from Preorder and Inorder Traversal
Problem 2: Construct Binary Tree from Postorder and Inorder Traversal
Resources:
Coding Platform: Leetcode - Construct Binary Tree from Inorder and Postorder Traversal
Problem 3: Serialize and Deserialize Binary Tree
Resources:
Coding Platform: Leetcode - Serialize and Deserialize Binary Tree
Problem 1: Print All Nodes at a Distance of K in a Binary Tree
Resources:
Coding Platform: Leetcode - All Nodes Distance K in Binary Tree
Problem 2: Minimum Time Taken to Burn the Binary Tree from a Node
Resources:
Coding Platform: Practice Here
Problem 3: Count Total Nodes in a Complete Binary Tree
Resources:
Coding Platform: Leetcode - Count Complete Tree Nodes
Problem 1: Root to Node Path in Binary Tree
Resources:
Coding Platform: Practice Here
Problem 2: LCA in Binary Tree
Resources:
Coding Platform: Leetcode - LCA in Binary Tree
Problem 3: Maximum Width of a Binary Tree
Resources:
Coding Platform: Leetcode - Maximum Width of Binary Tree
Problem 1: Zig Zag Traversal of Binary Tree
Resources:
Coding Platform: Leetcode - Zigzag Level Order Traversal
Problem 2: Boundary Traversal of Binary Tree
Resources:
Coding Platform: Leetcode - Boundary of Binary Tree
Problem 3: Vertical Order Traversal of Binary Tree
Resources:
Coding Platform: Leetcode - Vertical Order Traversal
Problem 1: Zig Zag Traversal of Binary Tree
Resources:
Coding Platform: Leetcode - Zigzag Level Order Traversal
Problem 2: Boundary Traversal of Binary Tree
Resources:
Coding Platform: Leetcode - Boundary of Binary Tree
Problem 3: Vertical Order Traversal of Binary Tree
Resources:
Coding Platform: Leetcode - Vertical Order Traversal
1. Problem - Height of a Binary Tree
Resources:
Platform: Leetcode - Maximum Depth of Binary Tree
2. Problem - Diameter of a Binary Tree
Resources:
Platform: Leetcode - Diameter of Binary Tree
3. Problem - Maximum Path Sum in a Binary Tree
Resources:
Platform: Leetcode - Binary Tree Maximum Path Sum
1. Problem - Level Order Traversal / Level Order Traversal in Spiral Form
Resources:
Platform: Leetcode - Level Order Traversal
2. Problem - Iterative Preorder Traversal of Binary Tree
Resources:
Platform: Leetcode - Iterative Preorder Traversal
3. Problem - Iterative Inorder Traversal of Binary Tree
Resources:
Platform: Leetcode - Iterative Inorder Traversal
1. Problem - Preorder Traversal of Binary Tree
Resources:
Platform: Leetcode - Preorder Traversal
2. Problem - Inorder Traversal of Binary Tree
Resources:
Platform: Leetcode - Inorder Traversal
3. Problem - Postorder Traversal of Binary Tree
Resources:
Platform: Leetcode - Postorder Traversal
1. Problem - Non-overlapping Intervals
Resources:
Platform: Leetcode - Non-overlapping Intervals
2. Problem - Introduction to Trees
Resources:
Platform: GeeksForGeeks - Introduction to Trees
3. Problem - Binary Tree Traversals in Binary Tree
Resources:
Platform: Coding Ninjas - Tree Traversal
1. Problem - Candy
Resources:
Platform: Leetcode - Candy
2. Problem - Insert Interval
Resources:
Platform: Leetcode - Insert Interval
3. Problem - Merge Intervals
Resources:
Platform: Leetcode - Merge Intervals
1. Problem - Jump Game
Resources:
Platform: Leetcode - Jump Game
2. Problem - Jump Game II
Resources:
Platform: Leetcode - Jump Game II
3. Problem - Minimum Number of Platforms Required for a Railway
Resources:
Platform: GeeksforGeeks - Minimum Platforms
1. Problem - Lemonade Change
Resources:
Platform: Leetcode - Lemonade Change
2. Problem - Valid Parenthesis Checker
Resources:
Platform: Leetcode - Valid Parenthesis String
3. Problem - N Meetings in One Room
Resources:
Platform: GeeksforGeeks - N Meetings in One Room
1. Problem - Assign Cookies
Resources:
Platform: Leetcode - Assign Cookies
2. Problem - Fractional Knapsack Problem
Resources:
Platform: GeeksforGeeks - Fractional Knapsack
3. Problem - Greedy Algorithm to Find Minimum Number of Coins
Resources:
Platform: GeeksforGeeks - Minimum Number of Coins
1. Problem - Maximum Sum Combination
Resources:
Platform: InterviewBit - Maximum Sum Combination
2. Problem - Find Median from Data Stream
Resources:
Platform: Leetcode - Find Median from Data Stream
3. Problem - K Most Frequent Elements
Resources:
Platform: Leetcode - Top K Frequent Elements
1. Problem - Hand of Straights
Resources:
Platform: Leetcode - Hand of Straights
2. Problem - Design Twitter
Resources:
Platform: Leetcode - Design Twitter
3. Problem - Kth Largest Element in a Stream
Resources:
1. Problem - Kth Largest Element in an Array
Resources:
2. Problem - Merge M Sorted Lists
Resources:
Platform: Leetcode - Merge K Sorted Lists
3. Problem - Task Scheduler
Resources:
Platform: Leetcode - Task Scheduler
1. Problem - Subarray with K Different Integers
Resources:
2. Problem - Minimum Window Substring
Resources:
Platform: Leetcode - Minimum Window Substring
1. Problem - Count Number of Nice Subarrays
Resources:
2. Problem - Number of Substrings Containing All Three Characters
Resources:
Platform: Leetcode - Number of Substrings Containing All Three Characters
3. Problem - Maximum Points You Can Obtain from Cards
Resources:
Platform: Leetcode - Maximum Points You Can Obtain from Cards
1. Problem - Longest Substring Without Repeating Characters
Resources:
Platform: Leetcode - Longest Substring Without Repeating Characters
2. Problem - Longest Repeating Character Replacement
Resources:
Platform: Leetcode - Longest Repeating Character Replacement
3. Problem - Binary Subarrays with Sum
Resources:
Platform: Leetcode - Binary Subarrays with Sum
1. Problem - Stock Span Problem
Resources:
Platform: Leetcode - Online Stock Span
2. Problem - Sliding Window Maximum
Resources:
Platform: Leetcode - Sliding Window Maximum
3. Problem - LFU Cache
Resources:
Platform: Leetcode - LFU Cache
Problem Statement 1: Remove k Digits
Resources:
Java: Remove k Digits (Java)
Python: Remove k Digits (Python)
Coding Platform: Leetcode - Remove k Digits
Problem Statement 2: Largest Rectangle in a Histogram
Resources:
Coding Platform: Leetcode - Largest Rectangle in a Histogram
Problem Statement 3: Maximal Rectangle
Resources:
Java: Maximal Rectangle (Java)
Python: Maximal Rectangle (Python)
Coding Platform: Leetcode - Maximal Rectangle
Day 33:
Calculate the sum of the minimum values of all subarrays of a given array using a monotonic stack.
📹 Resources:
💻 Coding Platform:
Sum of Subarray Minimums
Simulate collisions between asteroids using a stack-based approach to determine the final state of the asteroid field.
📹 Resources:
💻 Coding Platform:
Asteroid Collision
Calculate the sum of the range (difference between maximum and minimum) of all subarrays of a given array.
📹 Resources:
💻 Coding Platform:
Sum of Subarray Ranges
Day 32: Stack and Two-Pointer Techniques
Find the next greater element for each element of an array in another array using stack-based optimization.
📹 Resources:
💻 Coding Platform:
Next Greater Element I
Calculate the amount of water trapped between bars in a histogram using the two-pointer or stack approach.
📹 Resources:
💻 Coding Platform:
Trapping Rain Water
Day 31:
Problem - 1: All Divisors of a Number
Find all divisors of a given number in sorted order.
📹 Resources:
💻 Coding Platform:
All Divisors of a Number
Efficiently find all prime numbers less than a given number.
📹 Resources:
💻 Coding Platform:
Count Primes
Compute n raised to the power of x efficiently.
Day 30:
Find the number of bits that differ between two integers A and B.
📹 Resources:
💻 Coding Platform:
Minimum Bit Flips to Convert Number
In an array where every number appears an even number of times except one, find the odd-occurring number.
📹 Resources:
💻 Coding Platform:
Single Number
Generate all possible subsets (the power set) of a given set of integers.
Day 29:
Problem - 1: N Queen
Place N queens on an N x N chessboard such that no two queens threaten each other.
Resources:
📹 YouTube Links:
💻 Coding Platform:
N Queen on LeetCode
Determine if a graph can be colored using at most M colors such that no two adjacent vertices share the same color.
Resources:
📹 YouTube Links:
💻 Coding Platform:
M Coloring Problem on GeeksforGeeks
Given a string num and a target value, add binary operators (+, -, *) between digits in the string to achieve the target value.
Resources:
📹 YouTube Links:
💻 Coding Platform:
Expression Add Operators on LeetCode
Day 28:
Generate all unique subsets (power set) of a given array, ensuring no duplicates in the output.
Resources:
📹 YouTube Links:
💻 Coding Platform:
Subset Sum-II on LeetCode
Find all valid combinations of k numbers that sum up to a given value n, with each number between 1-9.
Resources:
📹 YouTube Links:
💻 Coding Platform:
Combination Sum-III on LeetCode
Given a string containing digits from 2-9, return all possible letter combinations that the number could represent (as per a phone keypad).
Resources:
📹 YouTube Links:
💻 Coding Platform:
Letter Combinations of a Phone Number on LeetCode
Day 27:
Generate all valid combinations of n pairs of parentheses.
Resources:
📹 YouTube Links:
💻 Coding Platform:
Generate Parentheses on LeetCode
Find the count of all subsequences of an array that sum up to a given value K.
Resources:
📹 YouTube Links:
💻 Coding Platform:
Perfect Sum Problem on GeeksforGeeks
Generate all subsequences or the power set of a given array.
Resources:
📹 YouTube Links:
💻 Coding Platform:
Subsets on LeetCode
Day 26:
Problem - 1: Recursive Implementation of atoi()
Resources:
📹 YouTube Links:
💻 Coding Platform:
String to Integer atoi() on LeetCode
Problem - 2: Count Good Numbers
Resources:
📹 YouTube Links:
💻 Coding Platform:
Count Good Numbers on LeetCode
Problem - 3: Sort a Stack Using Recursion
Resources:
📹 YouTube Links:
💻 Coding Platform:
Sort a Stack on GeeksforGeeks
Day 25:
Problem - 1: Reverse Linked List in Groups of Given Size K
Resources:
📹 YouTube Links:
💻 Coding Platform:
Reverse Nodes in K Group on LeetCode
Problem - 2: Rotate a Linked List
Resources:
📹 YouTube Links:
💻 Coding Platform:
Rotate List on LeetCode
Day 24: Doubly Linked List (DLL)
Problem - 1: Delete All Occurrences of a Key in Doubly Linked List
Resources:
📹 YouTube Links:
💻 Coding Platform:
Delete Key Occurrences in DLL on GeeksforGeeks
Problem - 2: Find Pairs with Given Sum in Doubly Linked List
Resources:
📹 YouTube Links:
💻 Coding Platform:
Find Pairs with Given Sum in DLL on GeeksforGeeks
Problem - 3: Remove Duplicates from Sorted Doubly Linked List
Resources:
📹 YouTube Links:
💻 Coding Platform:
Remove Duplicates from Sorted DLL on GeeksforGeeks
Day 23:
Problem - 1: Find Length of Loop in Linked List
Resources:
📹 YouTube Links:
💻 Coding Platform:
Length of Loop in LL on GeeksforGeeks
Problem - 2: Sort a Linked List of 0's, 1's, and 2's by Changing Links
Resources:
📹 YouTube Links:
💻 Coding Platform:
Sort LL of 0's, 1's, and 2's on GeeksforGeeks
Problem - 3: Add 1 to a Number Represented by a Linked List
Resources:
📹 YouTube Links:
💻 Coding Platform:
Add 1 to Number Represented by LL on GeeksforGeeks
Day 22: Doubly Linked List (DLL) Operations
Problem - 1: Insert a Node in a Doubly Linked List (DLL)
Resources:
📹 YouTube Links:
💻 Coding Platform:
Insert a Node in DLL on GeeksforGeeks
Problem - 2: Delete a Node in a Doubly Linked List (DLL)
Resources:
📹 YouTube Links:
💻 Coding Platform:
Delete Node in DLL on GeeksforGeeks
Problem - 3: Reverse a Doubly Linked List (DLL)
Resources:
📹 YouTube Links:
💻 Coding Platform:
Reverse a DLL on GeeksforGeeks
Day 21: Linked List Operations
Problem - 1: Inserting a Node in a Linked List
Resources:
📹 YouTube Links:
💻 Coding Platform:
Linked List Insertion on GeeksforGeeks
Problem - 2: Deleting a Node in a Linked List
Resources:
📹 YouTube Links:
💻 Coding Platform:
Delete Node in a Linked List on LeetCode
Problem - 3: Searching an Element in a Linked List
Resources:
📹 YouTube Links:
💻 Coding Platform:
Search in Linked List on GeeksforGeeks
Day 20:
Problem - 1: Sort Characters by Frequency
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Sort Characters by Frequency
Problem - 2: Implement Atoi (String to Integer Conversion)
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
String to Integer (Atoi)
Problem - 3: Longest Palindromic Substring (Without Dynamic Programming)
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Longest Palindromic Substring
Day 19:
Problem - 1: Largest Odd Number in a String
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Largest Odd Number in String
Problem - 2: Isomorphic Strings
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Isomorphic Strings
Problem - 3: Check if Two Strings are Anagrams of Each Other
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Valid Anagram
Day 18:
1: Find the Row with Maximum Number of 1's
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Row with Max 1's
Problem - 2: Search in a Row and Column-wise Sorted Matrix
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Search a 2D Matrix II
Problem - 3: Matrix Median
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Median in a Row-wise Sorted Matrix
Day 17:
Problem - 1: Kth Missing Positive Number
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Kth Missing Positive Number
Problem - 2: Split Array - Largest Sum
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Split Array - Largest Sum
Problem - 3: Kth Element of Two Sorted Arrays
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Kth Element of Two Sorted Arrays
Day 16: Advanced Search Techniques
Problem - 1: Find Square Root of a Number in O(log n)
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Square Root
Problem - 2: Koko Eating Bananas
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Koko Eating Bananas
Problem - 3: Find the Smallest Divisor Given a Threshold
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Find the Smallest Divisor
Day 15: Searching and Counting in Arrays
Problem - 1: Count Occurrences of a Number in a Sorted Array with Duplicates
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Number of Occurrence
Problem - 2: Search in Rotated Sorted Array II
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Search in Rotated Sorted Array II
Problem - 3: Find Peak Element
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Find Peak Element
Day 14:
Problem - 1: Binary Search to Find X in Sorted Array
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Binary Search
Problem - 2: Implement Upper Bound
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Ceil the Floor
Problem - 3: Floor/Ceil in Sorted Array
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Ceiling in a Sorted Array
Day 13: Advanced Array Manipulation
Problem - 1: Find the Repeating and Missing Number
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Find Missing and Repeating
Problem - 2: Count Inversions
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Inversion of Array
Problem - 3: Merge Two Sorted Arrays Without Extra Space
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Merge Sorted Array
Day 12:
Problem - 1: 4-Sum Problem
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
4-Sum Problem
Problem - 2: Count Number of Subarrays with Given XOR K
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Subarray with Given XOR K
Day 11: Array and Algorithm Challenges
Problem - 1: 2Sum Problem
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
2Sum Problem
Problem - 2: Kadane's Algorithm (Maximum Subarray Sum)
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Maximum Subarray Sum
Problem - 3: Leaders in an Array Problem
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Leaders in an Array
Day 10: Array Challenges
Problem - 1: Find Missing Number in an Array
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Missing Number Problem
Problem - 2: Find the Number that Appears Once, Others Twice
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Single Number Problem
Problem - 3: Longest Subarray with Given Sum K (Positives)
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Longest Subarray with Sum K Problem
Day 9: Array Operations
Problem - 1: Largest Element in an Array
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Largest Element in Array Problem
Problem - 2: Check if the Array is Sorted
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Check if Array is Sorted Problem%20to%20make%20nums.)
Problem - 3: Find the Union of Two Arrays
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Union of Two Arrays Problem
Day 8: Sorting Algorithms
Problem - 1: Insertion Sort
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Insertion Sort Problem
Problem - 2: Merge Sort
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Merge Sort Problem
Problem - 3: Quick Sort
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Quick Sort Problem
Day 7: Sorting Algorithms
Problem - 1: Selection Sort
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Selection Sort Problem
Problem - 2: Bubble Sort
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Bubble Sort Problem
Day 6: Array, String, and Series Problems
Problem - 1: Reverse a Given Array
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Reverse an Array Problem
Problem - 2: Check if the Given String is Palindrome
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Valid Palindrome Problem
Problem - 3: Fibonacci Series
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Fibonacci Number Problem
Advanced Pattern Problems
Problem - 1: Print Matrix with Given Number Pattern
Pattern:
4444444
4333334
4322234
4321234
4322234
4333334
4444444
Resources:
📹 YouTube Link
💻 Coding Platform:
Ninja and the Number Pattern I
Problem - 2: Symmetric Patterns
Pattern:
* *
** **
******
** **
* *
Resources:
📹 YouTube Link
💻 Coding Platform:
Symmetry Problem
Problem - 1: Understand Recursion by Printing Something N Times (Print 1 to N Without Loop)
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Print 1 to N Without Loop
Problem - 2: Print N to 1 Using Recursion
Resources:
📹 YouTube Links:
Python
💻 Coding Platform:
Print N to 1 Without Loop
Problem - 3: Factorial of a Number (Iterative and Recursive)
Resources:
Recursive Approach:
📹 YouTube Links:
Iterative Approach:
📹 YouTube Links:
💻 Coding Platform:
Factorial Problem
Problem - 1: Count Digits
Resources:
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💻 Coding Platform:
Count Digits Problem
Problem - 2: GCD or HCF
Resources:
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💻 Coding Platform:
GCD or HCF Problem
Problem - 3: Print All Divisors
Resources:
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💻 Coding Platform:
Print All Divisors Problem
*
* * *
* * * * *
* * * * * * *
Resources:
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💻 Coding Platform:
Pattern problems - 2
A
A B
A B C
A B C D
Resources:
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💻 Coding Platform:
Pattern problems - 3
markdown
Copy code
* * * *
* *
* *
* * * *
Resources:
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💻 Coding Platform:
Problem 1: If-Else Statements
Description:
Work on mastering If-Else Statements, an essential part of decision-making in programming.
Resources:
📹 YouTube Links:
💻 Coding Platform:
If-Else Problem on GeeksforGeeks
Problem 2: Switch-Case Statements
Description:
Learn about Switch-Case Statements, another way to handle multiple conditions effectively.
Resources:
📹 YouTube Links:
💻 Coding Platform:
Switch-Case Problem on GeeksforGeeks
Problem 3: For Loops
Description:
Explore For Loops and practice writing efficient loops with this prime-checking challenge.
Resources:
📹 YouTube Links:
💻 Coding Platform:
For Loops Prime Check Problem on GeeksforGeeks
