新建源汇S,T,根据题意可以建出一个DAG 设f[x][y]为从x走到y的回文路径的方案数,则 边界条件: f[x][x]=1 对于一条边x->y,若a[x]==a[y],则f[x][y]=1 转移方程为: 若a[x]==a[y],则f[x][y]=sum(f[i][j])(x->i有边,j->y有边) 若a[x]!=a[y],则f[x][y]=0 最终答案即为f[S][T],时间复杂度$O(L^2)$. #include<cstdio> #include<cstrin…

Search GO 说明:输入题号直接进入相应题目,如需搜索含数字的题目,请在关键词前加单引号 Problem ID Title Source AC Submit Y 1000 A+B Problem 10983 18765 Y 1036 [ZJOI2008]树的统计Count 5293 13132 Y 1588 [HNOI2002]营业额统计 5056 13607 1001 [BeiJing2006]狼抓兔子 4526 18386 Y 2002 [Hnoi2010]Bounce 弹飞绵羊 43…

Description Christine and Matt are playing an exciting game they just invented: the Number Game. The rules of this game are as follows. The players take turns choosing integers greater than 1. First, Christine chooses a number, then Matt chooses a nu…

Description Christine and Matt are playing an exciting game they just invented: the Number Game. The rules of this game are as follows. The players take turns choosing integers greater than 1. First, Christine chooses a number, then Matt chooses a nu…

[POJ1143]Number Game 试题描述 Christine and Matt are playing an exciting game they just invented: the Number Game. The rules of this game are as follows. The players take turns choosing integers greater than 1. First, Christine chooses a number, then Mat…

The AI has the following actions available: Action Function Shoot Fires the Kalashnikov Reload Reload the Kalashnikov with a full magazine Use bomb Use a bomb Use health pack Use a health pack to replenish health to full Move to tactical position Mov…

Pku 1143: Description Christine and Matt are playing an exciting game they just invented: the Number Game. The rules of this game are as follows. The players take turns choosing integers greater than 1. First, Christine chooses a number, then Matt ch…

菜鸟学习ACM,纪录自己成长过程中的点滴. 学习的路上,与君共勉. ACM学习-POJ-1143-Number Game Number Game Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 2914   Accepted: 1162 Description Christine and Matt are playing an exciting game they just invented: the Number Gam…

原文在: PEP 3131 -- Supporting Non-ASCII Identifiers. Python2并不支持非ASCII码标识符. PEP的全称是Python Enhancement Proposal, 即Python增强提案. 这个3131提案创建于2007年5月. Python3于2008年12月发布. Rationale一节开篇明义, 指出用母语命名标识符对代码清晰度和可维护性的提高. Python code is written by many people in the…

Number Game Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 3432 Accepted: 1399 Description Christine and Matt are playing an exciting game they just invented: the Number Game. The rules of this game are as follows. The players take turns…