100-days-of-code

100 days of Coding Challenge

Overview

Day	Title	Description	Language	Source	Link
1	COUNTING SORT ALGO	One of the sorting method, less time complexity(O(n))	CPP
2	Number of Good pairs	without bruteforce approach(ncr formula applied)	PYTHON	Leetcode	View Code
3	Binary Search	algorithm with O(log n) runtime complexity	CPP	Leetcode	View Code
4	Finding the missing char,Codechef Competetion Solved	Hashmap implemented solution	CPP,Python	Codechef	View Code
5	Balanced Brackets	Stack Method used to analyse the given brackets are balanced or not	CPP	HackerRank	View Code
6	Kadane's Algorithm	Given an array Arr[] of N integers. Find the contiguous sub-array(containing at least one number) which has the maximum sum and return its sum.	CPP	GFG-Practice	View Code
7	Strong Password	All characters in passwords are in [a-z], [A-Z], [0-9], or [!@#$%^&*()-+ ]. and length should be len>6	Python	Hackerrank	View Code
8	PALINDROME SUBSTRING	First find out substrings of String and return the count of Palindrome in Substrings	Python	Leetcode	View code
9	Pairs	Given an array of integers and a target value, determine the number of pairs of array elements that have a difference equal to the target value.	Python	Hackerrank	View code
10	Best Time to Buy and Sell	You are given an array prices where prices[i] is the price of a given stock on the ith dayReturn the maximum profit you can achieve from this transaction. If you cannot achieve any profit, return 0.	Python	Leetcode	View code
11	Pascal Triangle	Given an integer numRows, return the first numRows of Pascal's triangle.In Pascal's triangle, each number is the sum of the two numbers	Python	Leetcode	View code
12	Angry Professor	Arrival times go from on time () to arrived late ().Given the arrival time of each student and a threshhold number of attendees, determine if the class is cancelled.	Python3	Hackerrank	View code
13	Binary Tree Preorder Traversal	Given the root of a binary tree, return the preorder traversal of its nodes' values	CPP	Leetcode	View code
14	Reverse a String By Dots	Given a String S, reverse the string without reversing its individual words. Words are separated by dots.	Python3	GeeksForgeeks	View code
15	Counting Bits	Given an integer n, return an array ans of length n + 1 such that for each i (0 <= i <= n), ans[i] is the number of 1's in the binary representation of i.	CPP	Leetcode	View code
16	Group Anagrams	Given an array of strings strs, group the anagrams together. You can return the answer in any order.An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once.	Python3	Leetcode	View code
17	CodeChef	Starters24 Competion	Python3	Codechef	View code
18	Maximum Product of Word Lengths	Given a string array words, return the maximum value of length(word[i]) * length(word[j]) where the two words do not share common letters. If no such two words exist, return 0.	Python3	Leetcode	View code
19	Integer To Roman	Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M.	Python3	Leetcode	View code
20	Number of Pairs of Strings With Concatenation Equal to Target	Given an array of digit strings nums and a digit string target, return the number of pairs of indices (i, j) (where i != j) such that the concatenation of nums[i] + nums[j] equals target.	CPP	Leetcode	View code
21	Longest Consecutive Sequence	Given an unsorted array of integers nums, return the length of the longest consecutive elements sequence.You must write an algorithm that runs in O(n) time.	Python3	Leetcode	View code
22	Rotate The Array	Given an array, rotate the array to the right by k steps, where k is non-negative.	CPP	Leetcode	View code
23	Is Subsequence-Leetcode	A subsequence of a string is a new string that is formed from the original string by deleting some (can be none) of the characters without disturbing the relative positions of the remaining characters. (i.e., "ace" is a subsequence of "abcde" while "aec" is not).	Python3	Leetcode	View code
24	String Reverse(n)	Minimum number of ways to reverse the String	CPP	Codechef	View code
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