Twitter OA new!!

写在前面，也算是自己的一点总结和笔记，
希望自己能够按照标准的美国工程师的书写习惯而做，
还请路过的大神们多多指导！

There are tons of resources on the website
reference:
I am here to only show some problems that I met in the real OA, thank you for every great advice on my journey!

1. Authentication Token

My mindSet for this question:
//use a DS to store the ID and its related Expiry time(I used a HashMap, two int var

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of Knap
//use the DP matrix to solve it
//considering the question, the weight has been doubled when calculated
//just initialize the half size of the DP matrix;
//check the condition and always keep "look back" and finally you can get it!



路过看过且不要忘记加米，鞠躬鞠躬！