Personal solutions for AoC-2021, some of algorithms are UGLILY implemented (not optimal solutions), for now I push the code as soon as I get the stars, code style (naming consistency, structure, comment) and algorithms need to be reworked after.
注意事项: AoC 2021 题解，还没来得及进行代码优化和结构整理, 得到正确答案就直接push了, 所以在变量名上使用过于free style, 在代码重构前请谨慎阅读。