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2018-2019 ACM-ICPC, Asia Shenyang Regional Contest(补题)
A题 - Sockpuppets 未补 B题 - Sequences Generator 未补 C题 - Insertion Sort 签到题之一,排列计数。 题意:给你排列的长度$n$,要求你求出排列的个数,满足对其前k项排序后其最长上升子序列至少为$n-1$。 解决:当最长上升子序列为$n$时答 ...
分类:其他好文   时间:2018-12-03 12:54:32    阅读次数:645
UVA10405 Longest Common Subsequence【LCS+DP】
Given two sequences of characters, print the length of the longest common subsequence of both sequences.     Sequence 1:  &nb ...
分类:其他好文   时间:2018-12-02 19:20:57    阅读次数:225
AOJ_ALDS1_10_C Longest Common Subsequence【LCS+DP】
Longest Common Subsequence "Aizu ALDS1_10_C" For given two sequences X and Y, a sequence Z is a common subsequence of X and Y if Z is a subsequence of ...
分类:其他好文   时间:2018-12-01 11:12:55    阅读次数:194
Codeforces Round 450 Div2 B.Jzzhu and Sequences
B. Jzzhu and Sequences time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Jzzhu has invented ...
分类:其他好文   时间:2018-11-30 00:43:59    阅读次数:215
Leetcode-946 验证栈序列(Validate Stack Sequences)
1 class Solution 2 { 3 public: 4 bool validateStackSequences(vector& pushed, vector& popped) 5 { 6 stack s; 7 int pushedEnd = -1; 8 for... ...
分类:其他好文   时间:2018-11-25 20:31:43    阅读次数:297
Margarite and the best present
Little girl Margarita is a big fan of competitive programming. She especially loves problems about arrays and queries on them. Recently, she was prese ...
分类:其他好文   时间:2018-11-24 17:53:25    阅读次数:120
[Luogu]5048 [Ynoi2019模拟赛]Yuno loves sqrt technology III[分块]
题意 长为 $n$ 的序列,询问区间众数,强制在线。 $n\leq 5\times 10^5$. 分析 考虑分块,暴力统计出整块到整块之间的众数次数。 然后答案还可能出现在两边的两个独立的块中,开 $vector$ 记录每种数字出现的位置集合,然后暴力判断两边两个块中的元素出现的次数。发现并不需要知 ...
分类:其他好文   时间:2018-11-24 11:51:25    阅读次数:164
Codeforces 450B Jzzhu and Sequences
Jzzhu and Sequences Jzzhu has invented a kind of sequences, they meet the following property: You are given x and y, please calculate fn modulo 100000 ...
分类:其他好文   时间:2018-11-22 22:28:03    阅读次数:162
[Ynoi2019模拟赛]Yuno loves sqrt technology III
题目大意: 给你一个长为\(n\)的序列\(a\),\(m\)次询问,每次查询一个区间的众数的出现次数,强制在线。 解题思路: 出题人题解 众所周知lxl是个毒瘤,Ynoi道道都是神仙题 首先得离散化。 分块后,预处理\(F_{i,j}\)表示第\(i\sim j\)块的众数的出现次数。此处要用一个 ...
分类:其他好文   时间:2018-11-22 14:28:30    阅读次数:213
Codeforces Round #520 (Div. 2) C. Banh-mi
C. Banh-mi time limit per test:1 second memory limit per test:256 megabytes 题目链接:https://codeforc.es/contest/1062/problem/C Description: JATC loves Ba ...
分类:其他好文   时间:2018-11-20 00:04:00    阅读次数:186
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