Leetcode Diary

9. Palindrome Number

Leetcode Diary

Determine whether an integer is a palindrome. An integer is a palindrome when it reads the same backward as forward. Example 1: Input: 121 Output: true Example 2: Input: -121 Output: false...

Posted by Xudong on July 5, 2020

8. String to Integer (atoi)

Leetcode Diary

Implement atoi which converts a string to an integer. The function first discards as many whitespace characters as necessary until the first non-whitespace character is found. Then, startin...

Posted by Xudong on July 4, 2020

7. Reverse Integer

Leetcode Diary

Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 Note: Assume we are...

Posted by Xudong on July 3, 2020

6. ZigZag Conversion

Leetcode Diary

The string “PAYPALISHIRING” is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility) P A H N A P L...

Posted by Xudong on July 2, 2020

5. Longest Palindromic Substring

Leetcode Diary

Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000. Example 1: Input: "babad" Output: "bab" Note: "aba" is also a valid answer. ...

Posted by Xudong on July 1, 2020

Kubernetes CNIs

Flannel

CNI(Container Network Interface) Flannel Arch Flannel Features Flannel Packet switching way Overlay Network VXLAN UDP Routing Pros & Cons

Posted by Xudong on June 30, 2020

4. Median of Two Sorted Arrays

Leetcode Diary

There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)). You may assume n...

Posted by Xudong on June 29, 2020

3. Longest Substring Without Repeating Characters

Leetcode Diary

Given a string, find the length of the longest substring without repeating characters. Example 1: Input: "abcabcbb" Output: 3 Explanation: The answer is "abc", with the length of 3. Exampl...

Posted by Xudong on June 29, 2020

2. Add Two Numbers

Leetcode Diary

You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and re...

Posted by Xudong on June 28, 2020

1. Two Sum

Leetcode Diary

Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use t...

Posted by Xudong on April 21, 2020

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