根据数据和算法的类型进行了题目的分类，并且根据难易程度进行了排序。每个md文件中存储了对应部分的题目、题解和简单的思路记录。
Ex List：~~27,26,80,189,41,299,134,~~118,119,169,229,274,275,243,244,245,217,219,220,55,45,121,122,123,188,309,11,42,334,128,164,287,135,330,321,327,289,57,56,252,253,239,295,53,325,209,238,152,228,163,88,75,283,376,280,324,278,35