摘要：
Just record some about LaTeX! $\pi$ $\infty$ $\frac{a}{b}$ $\tfrac{a}{b}$ $\sqrt{a}$ $\sum_{a}^{b}$ $\prod\limits_{i = 0}^{n}$ $\int_{a}^{b}$ $_{a}^{b 阅读全文
摘要：
2015 asia xian regional F Color (容斥 + 组合数学) 题目链接 "http://codeforces.com/gym/100548/attachments" Description Recently, Mr. Bigrecieved n flowers from h 阅读全文