CF1593FRedBlackNumber（记忆化搜索，动态规划）xiaodangao
#[RedBlackNumber](http//codeforces.com/contest/1593/problem/F)
POJ3124.TheBookcase（题解）xiaodangao
思路我们发现一共需要求两维东西，一个是宽度，另一个是高度，那么依据我们的经验，可以将高度首先进行一次排序。那么是由高到低排好，还是由低到高排好呢？
EducationalCodeforcesRound115(RatedforDiv.2)（题解）xiaodangao
#[EducationalCodeforcesRound115(RatedforDiv.2)](https//codeforces.com/contest/1598)
P6327区间加区间sin和（题解）xiaodangao
思路根据$sin$，$cos$的运算来做。我们有
CodeforcesRound#729(Div.2)题解xiaodangao
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D.ShichikujiandPowerGrid(CodeforcesRound#597(Div.2)题解)xiaodangao
题目链接[D.ShichikujiandPowerGrid](https//codeforces.com/contest/1245/problem/D)
CodeforcesRound#726(Div.2)F.FigureFixing题解xiaodangao
题目链接[F.FigureFixing](https//codeforces.com/contest/1537/problem/F#)
CodeforcesRound#727(Div.2)题解xiaodangao
题目链接[CodeforcesRound#727(Div.2)](https//codeforces.com/contest/1539)
拉格朗日插值模板（P4781）xiaodangao
题目链接[拉格朗日插值](https//www.luogu.com.cn/problem/P4781)
GorgeousSequence（吉老师线段树）xiaodangao
题目链接[GorgeousSequence](http//acm.hdu.edu.cn/showproblem.php?pid=5306)