摘要：
K-th Number Time Limit: 20000MS Memory Limit: 65536K Case Time Limit: 2000MS Description You are working for Macrohard company in data structures depa 阅读全文
摘要：
As we all know,a palindrome number is the number which reads the same backward as forward,such as 666 or 747.Some numbers are not the palindrome numbe 阅读全文
摘要：
Battlestation Operational Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Problem Description > The Death Star, known 阅读全文
摘要：
Tree Time Limit: 1000MS Memory Limit: 30000K Description Give a tree with n vertices,each edge has a length(positive integer less than 1001). Define d 阅读全文
摘要：
Ch’s gift Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Problem Description Mr. Cui is working off-campus and he mi 阅读全文
摘要：
对于每个正整数 nn，我们定义它的 pp 进制表示 由 mm 个非负整数 a_1, a_2, \cdots, a_ma1,a2,⋯,am 组成，并且这些数字满足 \displaystyle n = \sum_{i = 1}^{m}{a_i p^{i - 1}}n=i=1∑m 阅读全文
摘要：
String Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 524288/524288 K (Java/Others) Problem Description Bob has a dictionary with N words in it. 阅读全文
摘要：
Classic Quotation Time Limit: 8000/4000 MS (Java/Others) Memory Limit: 524288/524288 K (Java/Others) Problem Description When online chatting, we can 阅读全文
摘要：
struct NTT { ll Pow(ll x,ll n) { ll ans=1,base=x%MOD; while(n) { if(n&1) ans=ans*base%MOD; base=base*base%MOD; n>>=1; } return ans; } ll getInv(ll x) 阅读全文
摘要：
小 Q 的棋盘 题目描述 小Q正在设计一种棋类游戏。在小Q设计的游戏中，棋子可以放在棋盘上的格点中。某些格点之间有连线，棋子只能在有连线的格点之间移动。整个棋盘上共有V个格点，编号为0,1,2…,V-1，它们是连通的，也就是说棋子从任意格点出发，总能到达所有的格点。小Q在设计棋盘时，还保证棋子从一个 阅读全文