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Zheng Xu

Leetcode: Longest Palindromic Substring. December 18, 2016. December 20, 2016. If asked during a job interview, I think most interviewers would accept the O(N 2) Dynamic Programming algorithm as the solution for the problem of finding the longest palindromic substring. But this problem can also be done in O(N) time by using a new data structure called Eertree (also known as palindromic tree). My Java solution: https:/ github.com/zhengxuca/Eertree. Codility Calcium 2015 Solution. December 8, 2016. Since w...

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Leetcode: Longest Palindromic Substring. December 18, 2016. December 20, 2016. If asked during a job interview, I think most interviewers would accept the O(N 2) Dynamic Programming algorithm as the solution for the problem of finding the longest palindromic substring. But this problem can also be done in O(N) time by using a new data structure called Eertree (also known as palindromic tree). My Java solution: https:/ github.com/zhengxuca/Eertree. Codility Calcium 2015 Solution. December 8, 2016. Since w...

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Zheng Xu | zhengxucoding.wordpress.com Reviews

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Leetcode: Longest Palindromic Substring. December 18, 2016. December 20, 2016. If asked during a job interview, I think most interviewers would accept the O(N 2) Dynamic Programming algorithm as the solution for the problem of finding the longest palindromic substring. But this problem can also be done in O(N) time by using a new data structure called Eertree (also known as palindromic tree). My Java solution: https:/ github.com/zhengxuca/Eertree. Codility Calcium 2015 Solution. December 8, 2016. Since w...

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Codility: NumberOfDiscIntersections | Zheng Xu

https://zhengxucoding.wordpress.com/2015/04/11/codility-numberofdiscintersections

April 11, 2015. One straightforward solution employs sorting and binary search. Sort the discs by the lowest point of each disc, which is the center minus the radius. Then for each disc, use binary search to find the right most disc in the array points that can intersect with the current disc. Time Complexity: O(N logN) for N number of discs. Codility Chlorum 2014 Solution. Minimum number formed by deleting K digits →. Leave a Reply Cancel reply. Enter your comment here. Address never made public).

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Zheng | Zheng Xu

https://zhengxucoding.wordpress.com/author/maopai

HackerRank University CodeSprint 2 Gold Medal. February 21, 2017. Https:/ www.hackerrank.com/results/university-codesprint-2/zheng xuca. I solved problem #4 by making an observation about the structure of the parent-child relationship, which then reduces the time complexity. I solved problem #5 by using DP. The hardest part of this problem is to think of an non-optimal solution to do this. Once you have a non-optimal algorithm, it’s easy to see that you could use DP to optimize it. January 30, 2017.

3

Solution to Codility Silicium 2014 | Zheng Xu

https://zhengxucoding.wordpress.com/2015/06/25/solution-to-codility-silicium-2014

Solution to Codility Silicium 2014. June 25, 2015. June 25, 2015. My code in Python:. Do a binary search on the area of the cakes, which takes Log (10,000 *10,000) time. 10,000 * 10,000 is roughly a constant multiple of X Y. Thus, the binary search costs O(log(X Y) . Checking if an area is the top K requires O(N) time. Thus, the overall time complexity is O( N log(X Y) . Solution to Codility Sulphur 2014. Codility Calcium 2015 Solution →. Leave a Reply Cancel reply. Enter your comment here.

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Codility Calcium 2015 Solution | Zheng Xu

https://zhengxucoding.wordpress.com/2016/12/08/codility-calcium-2015-solution

Codility Calcium 2015 Solution. December 8, 2016. Code: https:/ codility.com/cert/view/certZ24M7A-KB9MSP842E82CPV2/. We are asked to minimize the length of the longest uncovered path in the tree of intersections and roads. Let X be the length of the longest uncovered path after installing K number of cameras. What is the range of X? What is the minimum possible value for X? What is the maximum possible value for X? So write a function with a name like:. Int minimumCamerasNeeded( TreeNode root, int X).

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About | Zheng Xu

https://zhengxucoding.wordpress.com/about

This blog contains some of my solutions to questions on Codility. I’m seeking a new job, so contact me if your company wants to hire me as a software engineer or data engineer. Work Experience: Software Engineer at Microsoft in Redmond, WA, USA. Skills: Java, Golang, C#. Email: zheng.xu.job@gmail.com. Leave a Reply Cancel reply. Enter your comment here. Fill in your details below or click an icon to log in:. Address never made public). You are commenting using your WordPress.com account. ( Log Out.

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Unofficial Solutions to the Training by Codility – Code Says

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C code. C code run. Run code run…please! Cracking the Coding Interview. Unofficial Solutions to the Training by Codility. Codility.com is another great place to improve our programming skills. Besides challenge questions, it also provides some training problems here. Train myself, and record here. Binary-Gap : Python solution. Odd-Occurrences-In-Array : Python solution. Cyclic-Rotation : Python/C solution. Lesson 3: Time Complexity. Frog-Jmp : Python solution. Perm-Missing-Elem : Python solution. Boron20...

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Zheng Xu

Leetcode: Longest Palindromic Substring. December 18, 2016. December 20, 2016. If asked during a job interview, I think most interviewers would accept the O(N 2) Dynamic Programming algorithm as the solution for the problem of finding the longest palindromic substring. But this problem can also be done in O(N) time by using a new data structure called Eertree (also known as palindromic tree). My Java solution: https:/ github.com/zhengxuca/Eertree. Codility Calcium 2015 Solution. December 8, 2016. Since w...

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