HDU 5904 - LCIS [ DP ]    BestCoder Round #87 题意: 给定两个序列,求它们的最长公共递增子序列的长度, 并且这个子序列的值是连续的 分析: 状态转移方程式: dp[a[i]] = max(dp[a[i]], dp[a[i]-1] + 1); 发现其实可以简化为 dp[a[i]] = dp[a[i]-1] + 1:因为计算过程中dp[a[i]]不会降低 对两个序列都求一遍,然后取两者最小值的最大值 #include <cstdio> #include…

LCIS Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Problem Description Alex has two sequences a1,a2,...,an and b1,b2,...,bm. He wants find a longest common subsequence that consists of consecutive values in incre…

传送门 Description Alex has two sequences a1,a2,...,an and b1,b2,...,bm. He wants find a longest common subsequence that consists of consecutive values in increasing order. Input There are multiple test cases. The first line of input contains an integer…

$dp$. 这题的突破口在于要求数字是连续的. 可以分别记录两个串以某个数字为结尾的最长上升长度,然后枚举一下以哪个数字为结尾就可以得到答案了. 因为$case$有点多,不能每次$memset$,额外开一个数组记录一下这组$case$中数字有没有出现过. #pragma comment(linker, "/STACK:1024000000,1024000000") #include<cstdio> #include<cstring> #include<cm…

Time Limit: 4000/2000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 519    Accepted Submission(s): 238 Problem Description Alex has two sequences a1,a2,...,an and b1,b2,...,bm. He wants find a longest common subse…

题目链接:http://acm.hdu.edu.cn/showproblem.php? pid=3308 LCIS Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 5792    Accepted Submission(s): 2513 Problem Description Given n integers. You have two…

Problem Description Given n integers.You have two operations:U A B: replace the Ath number by B. (index counting from 0)Q A B: output the length of the longest consecutive increasing subsequence (LCIS) in [a, b].   Input T in the first line, indicati…

昨天热身赛的简单版:LCIS.昨天那题用树链剖分,不知道哪里写错了,所以水了水这题看看合并.更新方式是否正确,发现没错啊.看来应该是在树链剖分求lca时写错了... 题目:给出n个数,有两种操作: 1.单点修改 2.区间询问:最长连续上升子序列 分析:只需要维护五个域就行:lix,rdx,mix,lval,rval.记录当前区间 最左的值lval ,  最右的值rval,必须从左起连续上升序列的长度lix,必须右起下降的长度rdx.合并时注意下即可. #include <cstdio> #in…

题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=3308 题目很好懂,就是单点更新,然后求区间的最长上升子序列. 线段树区间合并问题,注意合并的条件是a[mid + 1] > a[mid],写的细心点就好了. #include <iostream> #include <cstring> #include <cstdio> using namespace std; ; struct SegTree { int l , r…

LCIS Time Limit: 6000/2000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5951    Accepted Submission(s): 2578 Problem Description Given n integers.You have two operations:U A B: replace the Ath number by B. (index…