摘要：卡特兰数 公式：f(x)=f(2)*f(x-1)+f(3)*f(x-2)+......+f(x-1)*f(2) #include<iostream>#include<cstdlib>#include<cmath>#include<cstdio>#include<cstring>#include<st 阅读全文

摘要：对拍在oi中有很大的用处（我居然现在才会...) 首先我们先制作一个数据生成器 #include<iostream>#include<cstdio>#include<cstring>#include<string>#include<algorithm>#include<cctype>#include 阅读全文

摘要：图论算法 并查集中的启发式合并 hash素数表(备用) 斜率优化学习笔记 从头到尾彻底理解KMP 各种树结构之三 Splay 阅读全文

摘要：传送门 题目 Formula One championship consists of series of races called Grand Prix. After every race drivers receive points according to their final positi 阅读全文

摘要：传送门 题目 The problem uses a simplified TCP/IP address model, please read the statement carefully. An IP address is a 32-bit integer, represented as a gr 阅读全文