자료구조 및 알고리즘 공부
참고
https://github.com/aalhour/C-Sharp-Algorithms
priority queue
https://ericbackhage.net/c/how-to-design-a-priority-queue-in-c/
slider puzzle
https://coursera.cs.princeton.edu/algs4/assignments/8puzzle/specification.php
combination
permutation
https://jamesmccaffrey.wordpress.com/2009/05/25/generating-all-permutations/
https://docs.microsoft.com/en-us/archive/msdn-magazine/2006/december/test-run-string-permutations