Projects

This repository is used to keep small projects and useful utils.

purines

This program is used to find all strings of length 20 consisting of 'A', 'T', 'G', 'C', each valid one should satisfy the following requirements:

1. the number of 'C' and 'G' is no less than 12 and no more than 14
2. it contains no substrings like "AAAA", "TTTT", "GGGG", and "CCCC"