Category: technical

In most cases, if you are learning a new language, you will have to figure out in what cases, variables are copied by references and in what other cases, …

The problem is from codeforces: http://www.codeforces.com/problemset/problem/137/B It took me several attempts to get it right for this problem although it is not difficult. The problem is find out how …

I came across the any keyword in Python a couple days ago when I was trying to solve the problem in https://helloacm.com/a-sleuth/ At that time I did not fully …

I ran into the github site today and find it very popular. Therefore I decided to register a free account and start using it. The github is also one …

The problem is from codeforces: http://www.codeforces.com/problemset/problem/158/C Using a stack will help solve this problem. Luckly, python supports stack structure by using list. The append() and pop() are used to …