April LeetCoding Challenge 2021

In this repository provided my Python solutions of April LeetCoding Challenge problems.

Introduction

In this repository provided my Python solutions of April LeetCoding Challenge problems.

I highly recommend you to try and solve problems yourself before look at the solutions here.
Solutions and approaches may be not optimal.
All Solutions here are in Python 3.

None

№	Title	Solution	Difficulty
234.	Palindrome Linked List	Python	Easy
474.	Ones and Zeroes	~~Python~~	Medium
32.	Longest Valid Parentheses	~~Python~~	Hard
622.	Design Circular Queue	Python	Medium
775.	Global and Local Inversions	Python	Medium
1551.	Minimum Operations to Make Array Equal	Python	Medium
1704.	Determine if String Halves Are Alike	Python	Easy

№	Title	Solution	Difficulty
17.	Letter Combinations of a Phone Number	Python	Medium
953.	Verifying an Alien Dictionary	Python	Easy
329.	Longest Increasing Path in a Matrix	Python	Hard
1302.	Deepest Leaves Sum	Python	Medium
667.	Beautiful Arrangement II	Python	Medium
341.	Flatten Nested List Iterator	Python	Medium
86.	Partition List	Python	Medium

№	Title	Solution	Difficulty
509.	Fibonacci Number	Python	Easy
1209.	Remove All Adjacent Duplicates in String II	~~Python~~	Medium
1074.	Number of Submatrices That Sum to Target	~~Python~~	Hard
19.	Remove Nth Node From End of List	Python	Medium
377.	Combination Sum IV	~~Python~~	Medium
589.	N-ary Tree Preorder Traversal	Python	Easy
120.	Triangle	Python	Medium

№	Title	Solution	Difficulty
554.	Brick Wall	Python	Medium
696.	Count Binary Substrings	Python	Easy
1192.	Critical Connections in a Network	~~Python~~	Hard
48.	Rotate Image	Python	Medium
1642.	Furthest Building You Can Reach	~~Python~~	Medium
326.	Power of Three	Python	Easy
63.	Unique Paths II	Python	Medium

№	Title	Solution	Difficulty
34.	Find First and Last Position of Element in Sorted Array	Python	Medium
970.	Powerful Integers	Python	Medium

The code is open-source and licensed under the MIT License.