Problem Solving Python Part 1

Problems

Finding the Missing Number in a List: Given a list containing n distinct numbers taken from 0, 1, 2, ..., n, find the one that is missing from the list.

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Two Sum Problem: Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to the target.

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Check if a String is a Palindrome: Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.Reverse a Linked List: Given the head of a singly linked list, reverse the list, and return the reversed list.

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Generate Fibonacci Sequence: Generate the first n numbers of the Fibonacci sequence.

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Reverse a Linked List: Given the head of a singly linked list, reverse the list, and return the reversed list.

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Merge Two Sorted Lists: Given two sorted linked lists, merge them into one sorted linked list.

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Climbing Stairs: You are climbing a staircase. It takes n steps to reach the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top?

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Finding the Longest Substring Without Repeating Characters: Given a string, find the length of the longest substring without repeating characters.

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Find the Kth Largest Element in an Array: Given an array nums and an integer k, return the kth largest element in the array.

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Finding the First Unique Character in a String: Given a string, find the first non-repeating character and return its index. If it does not exist, return -1.

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