README.md

SOLVING 200 LEETCODE QUESTIONS

Welcome to Solving 200 Leetcode Questions channel.

Please don't forget to give this repo a Star ⭐

Join our discord community to get daily LeetCode challenges - Click Here to join

How to Contribute? Click Here To Learn

What is this channel about?

This is a study group which will serve the purpose of building an open source community which codes and prepare for job interviews together. The aim is not to become a competitive programmer. Go ahead and add your friends or siblings.

Which programming language to pick?

Any programming language with OOPs is acceptable. But Java/Python3 is recommended. CPP is also a good choice because it is fast when compared to any other programming language.

Why Java/Python3?

Because later on we might build the projects. Java and Python3 have some of the best Frameworks that you can use to build any production level application.

What do you need to become a member of this group?

You just have to be disciplined and punctual to become a member of this group. You will be removed from the group in case of any misconduct or indiscipline is observed.

How much hours per day should you dedicate for this?

Three Hours per day dedication. It all depends on your speed of learning.

When are we starting?

Starting 10th August, 2020 you will receive daily tasks. Till that time create a Leetcode account and start practicing the basics in your favourite programming language.

What to learn before we receive the daily task?

In any programming language of your choice, you should be comfortable with: Variables, Data types(int, float, char, string, etc), Operators(arithmetic, comparison, bitwise, etc), Control Statements(if-else, for and while loop, break and continue) Apart from this: For Java -> Collections For CPP -> STL

All the best!

⚠️ WARNINGS:

1. The path ahead is going to be bumpy and difficult. Join at your own risk.
2. Dedicate at-least 3 hours per day. Sundays will be off. Over doing something is also dangerous.
3. We will be coding for at-least 2 months daily to see some improvements.

Day	Problem Number	Problem Name	Available Solutions	Topic
Day 1	LeetCode 1480	Running Sum of 1d Array	python3 cpp java	Array and Maths
Day 1	LeetCode 1470	Shuffle the Array	python3 cpp java	Array and Maths
Day 1	LeetCode 1431	Kids With the Greatest Number of Candies	python3 cpp java	Array and Maths
Day 2	LeetCode 1108	Defanging an IP Address	python3 cpp java	Array and Maths
Day 2	LeetCode 1295	Find Numbers with Even Number of Digits	python3 cpp java	Array and Maths
Day 2	LeetCode 1512	Number of Good Pairs	python3 cpp java	Array and Maths
Day 3	LeetCode 1365	How Many Numbers Are Smaller Than the Current Number	python3 cpp java	Array and Maths
Day 3	LeetCode 1281	Subtract the Product and Sum of Digits of an Integer	python3 cpp java	Array and Maths
Day 3	LeetCode 1486	XOR Operation in an Array	python3 cpp java	Array and Maths
Day 4	LeetCode 1464	Maximum Product of Two Elements in an Array	python3 cpp java	Array and Maths
Day 4	LeetCode 1395	Count Number of Teams	python3 cpp java	Array and Maths
Day 4	LeetCode 1450	Number of Students Doing Homework at a Given Time	python3 cpp java	Array and Maths
Day 5	LeetCode 1342	Number of Steps to Reduce a Number to Zero	python3 cpp java	Bit Manipulation
Day 5	LeetCode 338	Counting Bits	python3 cpp java	Bit Manipulation
Day 5	LeetCode 136	Single Number	python3 cpp java	Bit Manipulation
Day 6	LeetCode 1356	Sort Integers by The Number of 1 Bits	python3 cpp java	Bit Manipulation
Day 6	LeetCode 260	Single Number III	python3 cpp java	Bit Manipulation
Day 6	LeetCode 78	Subsets	python3 cpp java	Bit Manipulation
Day 7	LeetCode 389	Find the Difference	python3 cpp java	Bit Manipulation
Day 7	LeetCode 461	Hamming Distance	python3 cpp java	Bit Manipulation
Day 7	LeetCode 137	Single Number II	python3 cpp java	Bit Manipulation
Day 8	LeetCode 268	Missing Number	python3 cpp java	Array and Maths
Day 8	LeetCode 42	Trapping Rain Water	python3 cpp java	Array and Maths
Day 8	LeetCode 53	Maximum Subarray	python3 cpp java	Array and Maths
Day 9	LeetCode 287	Find the Duplicate Number	python3 cpp java	Array and Maths
Day 9	LeetCode 1200	Minimum Absolute Difference	python3 cpp java	Array and Maths
Day 9	LeetCode 304	Range Sum Query 2D - Immutable	python3 cpp java	Array and Maths
Day 10	LeetCode 1351	Count Negative Numbers in a Sorted Matrix	python3 cpp java	Binary Search
Day 10	LeetCode 34	Find First and Last Position of Element in Sorted Array	python3 cpp java	Binary Search
Day 10	LeetCode 69	Sqrt(x)	python3 cpp java	Binary Search
Day 11	LeetCode 162	Find Peak Element	python3 cpp java	Binary Search
Day 11	LeetCode 153	Find Minimum in Rotated Sorted Array	python3 cpp java	Binary Search
Day 11	LeetCode 33	Search in Rotated Sorted Array	python3 cpp java	Binary Search
Day 12	LeetCode 977	Squares of a Sorted Array	python3 cpp java	Two Pointers
Day 12	LeetCode 763	Partition Labels	python3 cpp java	Two Pointers
Day 12	LeetCode 344	Reverse String	python3 cpp java	Two Pointers
Day 13	LeetCode 1528	Shuffle String	python3 cpp java	Sorting
Day 13	LeetCode 1561	Maximum Number of Coins You Can Get	python3 cpp java	Sorting
Day 13	LeetCode 1329	Sort the Matrix Diagonally	python3 cpp java	Sorting
Day 14	LeetCode 1502	Can Make Arithmetic Progression From Sequence	python3 cpp java	Sorting
Day 14	LeetCode 1387	Sort Integers by The Power Value	python3 cpp java	Sorting
Day 14	LeetCode 1122	Relative Sort Array	python3 cpp java	Sorting
Day 15	LeetCode 1030	Matrix Cells in Distance Order	python3 cpp java	Sorting
Day 15	LeetCode 973	K Closest Points to Origin	python3 cpp java	Sorting
Day 15	LeetCode 164	Maximum Gap	python3 cpp java	Sorting
Day 16	LeetCode 46	Permutations	python3 cpp java	Recursion and Backtracking
Day 16	LeetCode 1079	Letter Tile Possibilities	python3 cpp java	Recursion and Backtracking
Day 16	LeetCode 1219	Path with Maximum Gold	python3 cpp java	Recursion and Backtracking
Day 17	LeetCode 1137	N-th Tribonacci Number	python3 cpp java	Recursion and Backtracking
Day 17	LeetCode 22	Generate Parentheses	python3 cpp java	Recursion and Backtracking
Day 17	LeetCode 78	Subsets	python3 cpp java	Recursion and Backtracking
Day 18	LeetCode 1415	The k-th Lexicographical String of All Happy Strings of Length n	python3 cpp java	Recursion and Backtracking
Day 18	LeetCode 17	Letter Combinations of a Phone Number	python3 cpp java	Recursion and Backtracking
Day 18	LeetCode 996	Number of Squareful Arrays	python3 cpp java	Recursion and Backtracking
Day 19	LeetCode 1512	Number of Good Pairs	python3 cpp java	Hashing
Day 19	LeetCode 771	Jewels and Stones	python3 cpp java	Hashing
Day 19	LeetCode 1365	How Many Numbers Are Smaller Than the Current Number	python3 cpp java	Hashing
Day 20	LeetCode 974	Subarray Sums Divisible by K	python3 cpp java	Hashing
Day 20	LeetCode 1	Two Sum	python3 cpp java	Hashing
Day 20	LeetCode 560	Subarray Sum Equals K	python3 cpp java	Hashing
Day 21	LeetCode 1381	Design a Stack With Increment Operation	python3 cpp java	Stacks
Day 21	LeetCode 921	Minimum Add to Make Parentheses Valid	python3 cpp java	Stacks
Day 21	LeetCode 901	Online Stock Span	python3 cpp java	Stacks
Day 22	LeetCode 225	Implement Stack using Queues	python3 cpp java	Stacks
Day 22	LeetCode 155	Min Stack	python3 cpp java	Stacks
Day 22	LeetCode 20	Valid Parentheses	python3 cpp java	Stacks
Day 23	LeetCode 933	Number of Recent Calls	python3 cpp java	Queue
Day 23	LeetCode 621	Task Scheduler	python3 cpp java	Queue
Day 23	LeetCode 622	Design Circular Queue	python3 cpp java	Queue
Day 24	LeetCode 1290	Convert Binary Number in a Linked List to Integer	python3 cpp java	Linked List
Day 24	LeetCode 876	Middle of the Linked List	python3 cpp java	Linked List
Day 24	LeetCode 237	Delete Node in a Linked List	python3 cpp java	Linked List
Day 25	LeetCode 206	Reverse Linked List	python3 cpp java	Linked List
Day 25	LeetCode 21	Merge Two Sorted Lists	python3 cpp java	Linked List
Day 25	LeetCode 141	Linked List Cycle	python3 cpp java	Linked List
Day 26	LeetCode 160	Intersection of Two Linked Lists	python3 cpp java	Linked List
Day 26	LeetCode 19	Remove Nth Node From End of List	python3 cpp java	Linked List
Day 26	LeetCode 707	Design Linked List	python3 cpp java	Linked List
Day 27	LeetCode 1302	Deepest Leaves Sum	python3 cpp java	Binary Trees
Day 27	LeetCode 1315	Sum of Nodes with Even-Valued Grandparent	python3 cpp java	Binary Trees
Day 27	LeetCode 617	Merge Two Binary Trees	python3 cpp java	Binary Trees
Day 28	LeetCode 144	Binary Tree Preorder Traversal	python3 cpp java	Binary Trees
Day 28	LeetCode 94	Binary Tree Inorder Traversal	python3 cpp java	Binary Trees
Day 28	LeetCode 145	Binary Tree Postorder Traversal	python3 cpp java	Binary Trees
Day 29	LeetCode 102	Binary Tree Level Order Traversal	python3 cpp java	Binary Trees
Day 29	LeetCode 107	Binary Tree Level Order Traversal II	python3 cpp java	Binary Trees
Day 29	LeetCode 103	Binary Tree Zigzag Level Order Traversal	python3 cpp java	Binary Trees