# Find and Replace Pattern (Leetcode 890)

Difficulty: Medium Link: Day 21: May Leetcode Challenge Problem Description Given a list of strings words and a string pattern, return a list of words[i] that match pattern. You may return the…

# Valid Number (Leetcode 65)

Difficulty: Hard Link : Day 15: May Leetcode Challenge Asked in : Facebook, Linkedin, Twitch Problem Description A valid number can be split up into these components…

# Ambiguous Coordinates (Leetcode 816)

Difficulty: Medium Link: Day 13: May Leetcode Challenge Problem Description We had some 2-dimensional coordinates, like “(1, 3)” or “(2, 0.5)”.  Then, we removed all commas, decimal points, and…

# Count Primes

Difficulty: Easy Link: Day 2: May LeetCode Challenge Problem Description Count the number of prime numbers less than a non-negative number, n. Examples Constraints 0 <=…

# Jump Game II (Leetcode 45)

Difficulty: Medium Link : Day 5: May Leetcode Challenge Problem Description Given an array of non-negative integers nums, you are initially positioned at the first index…

# Non-decreasing Array (Leetcode 665)

Difficulty: Medium Link: Day 4 : May Leetcode Challenge Problem Description Given an array nums with n integers, your task is to check if it could become non-decreasing by…

# N-ary Tree Preorder Traversal (Leetcode 589)

Difficulty : Easy Link: April Leetcoding Challenge: Day 20 Problem Statement Given the root of an n-ary tree, return the preorder traversal of its nodes’ values. Nary-Tree input…

# Flatten Nested List Iterator (Leetcode 341)

Difficulty : Medium Link : April Leetcoding Day 13 Problem Description You are given a nested list of integers nestedList. Each element is either an integer…

# Beautiful Arrangement II (Leetcode 667)

Difficulty : Medium Link : April Leetcoding Challenge 2021: Day 12 Problem Statement Given two integers n and k, you need to construct a list which contains n different positive…

# Longest Valid Parentheses (Leetcode 32)

Difficulty : Hard Link :April Leetcoding Challenge 2021 : Day 3 Problem statement Given a string containing just the characters ‘(‘ and ‘)’, find the length of the…