“Life is not a race, but a journey to be savoured each step of the way” by Brian Dyson
169. Majority Element
Given an array nums of size n, return the majority element.
The majority element is the element that appears more than ⌊n / 2⌋ times. You may assume that the majority element always exists in the array.
Follow-up: Could you solve the problem in linear time and in Ｏ(1) space?
168. Excel Sheet Column Title
Given a positive integer, return its corresponding column title as appear in an Excel sheet.
For example:
1 -> A
2 -> B
3 -> C
...
26 -> Z
27 -> AA
28 -> AB
...
Two Sum II - Input array is sorted
Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number.
The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2.
160. Intersection of Two Linked Lists
Write a program to find the node at which the intersection of two singly linked lists begins.
For example, the following two linked lists:
155. Min Stack
Design a stack that supports push, pop, top, and retrieving the minimum element in constant time.
141. Linked List Cycle
Given head, the head of a linked list, determine if the linked list has a cycle in it.
There is a cycle in a linked list if there is some node in the list that can be reached again by continuously following the next pointer. Internally, pos is used to denote the index of the node that tail's next pointer is connected to. Note that pos is not passed as a parameter.
Return true if there is a cycle in the linked list. Otherwise, return false.
Given a non-empty array of integers nums, every element appears twice except for one. Find that single one.
Follow up: Could you implement a solution with a linear runtime complexity and without using extra memory?
125. Valid Palindrome
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
Note: For the purpose of this problem, we define empty string as valid palindrome.
122. Best Time to Buy and Sell Stock II
Say you have an array prices for which the ith element is the price of a given stock on day i.
Tutorial - PyCharm Installation and build project environment for the development of Ryu controller
Are you developing python project on Ubuntu right now? When you are writing code, I guess that you edit file by vi, vim or 'gedit'. Maybe these tools are convenient to you, but those are inefficient and hard to maintain program for the development of big projet.