简单的一个分类整理
难度从0~5分类
更新时间：2018年10月18日
| 题号 | 标题 | 类型 | 难度 | 提示 |
|---|---|---|---|---|
| 1394 | Minimum Inversion Number | 线段树 | 2.5 | 核心是拿线段树求逆序数：单点更新，区间求和 |
| 1754 | I Hate It | 线段树 | 2.5 | 线段树裸题：单点更新、区间最值 |
| 1846 | Brave Game | 巴士博弈 | 1 | 巴士博弈模板题，判断是否第一次取就可以取成（m+1）的倍数即可，说白了就是石子数是否是（m+1）的倍数，是的话永远就取不到就是必败。 |
| 2037 | 今年暑假不AC | 贪心 | 0.5 | 贪心入门 |
| 2043 | 密码 | 水题 | 0 | c语言练习题 |
| 2795 | Billboard | 线段树 | 2.5 | 线段树：单点更新，区间最值 |
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