A. Robot Sequence time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Calvin the robot lies in an infinite rectangular grid. Calvin's source code contains a list of n commands, each either 'U'…

C. Longest Regular Bracket Sequence Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/problemset/problem/5/C Description This is yet another problem dealing with regular bracket sequences. We should remind you that a bracket sequence…

A. Robot Sequence time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Calvin the robot lies in an infinite rectangular grid. Calvin's source code contains a list of n commands, each either 'U'…

A. Robot Sequence time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output Calvin the robot lies in an infinite rectangular grid. Calvin's source code contains a list of n commands, each either 'U'…

(CodeForces - 5C)Longest Regular Bracket Sequence time limit per test:2 seconds memory limit per test:256 megabytes input:standard input output:standard output This is yet another problem dealing with regular bracket sequences. We should remind you t…

A. Robot Sequence 题目连接: http://www.codeforces.com/contest/626/problem/A Description Calvin the robot lies in an infinite rectangular grid. Calvin's source code contains a list of n commands, each either 'U', 'R', 'D', or 'L' - instructions to move a…

  A. Robot Sequence   time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Calvin the robot lies in an infinite rectangular grid. Calvin's source code contains a list of n commands, each either…

Easy Sequence Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others)Total Submission(s): 766    Accepted Submission(s): 208 Problem Descriptionsoda has a string containing only two characters -- '(' and ')'. For every c…

a[i] 表示以i字符开头的合法序列有多少个 b[i] 表示以i字符结尾的合法序列有多少个 up表示上一层的'('的相应位置 mt[i] i匹配的相应位置 c[i] 包括i字符的合法序列个数  c[i]=c[up[i]]+a[i]*b[mt[i]] 括号序列不一定是合法的.... Easy Sequence Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 131072/131072 K (Java/Others) Total Sub…

This is yet another problem dealing with regular bracket sequences. We should remind you that a bracket sequence is called regular, if by inserting «+» and «1» into it we can get a correct mathematical expression. For example, sequences «(())()», «()…