题面 CF1437E Make It Increasing 给 \(n\) 个数 \(a_i\),固定 \(k\) 个下标 \(b_i\),求只修改不在 \(b_i\) 中的下标的值使 \(a_i\) 严格单调递增的最少修改次数. 数据范围:\(1\le n\le 5\cdot 10^5\),\(0\le k\le n\). 题解 分成 \(k+1\) 段做没有问题,蒟蒻的做法是线段树维护 dp. 旁边老爷的做法是区间长度减去最长上升子序列长度,蒟蒻没想到,还想了单调队列优化好久. 题目转化为对…

[题解]Greatest Common Increasing Subsequence vj 唉,把自己当做DP入门选手来总结这道题吧,我DP实在太差了 首先是设置状态的技巧,设置状态主要就是要补充不漏并且适合转移. 这样的区间对区间有个设置状态的技巧:一维钦定一维区间 具体来说,是这个意思: 我们要方便记录状态 ,所以我们记录一维区间的答案 我们要可以转移,所以我们钦定一个状态方便转移 我们要方案互斥,所以我们钦定一个状态方便转移(方法同上,钦定这个技巧同时满足了两种要求) 接下来是对于方案的记…

1.题目描述 2.问题分析 从每一个num[i]往前扫描即可. 3.代码 int findLengthOfLCIS(vector<int>& nums) { ){ return nums.size() ; } vector<); ; ; i < nums.size() ; i++){ ; ; j >= ; j--){ ] ) maxI++; else break; } maxans = max( maxI, maxans); } return maxans; }…

[题目描述] Give an integer array,find the longest increasing continuous subsequence in this array. An increasing continuous subsequence: Can be from right to left or from left to right. Indices of the integers in the subsequence should be continuous. Not…

1.题目描述 2/问题分析 利用中序遍历,然后重新构造树. 3.代码 TreeNode* increasingBST(TreeNode* root) { if (root == NULL) return NULL; vector<int> v; inorder(root,v); TreeNode* dummy = ); TreeNode *p = dummy; for (vector<int>::iterator it = v.begin(); it != v.end(); it+…

1.题目描述 2.题目分析 使用动态规划,在计算以每个字符结尾的最长子序列. 3.代码 int lengthOfLIS(vector<int>& nums) { ){ ; } vector<); ; ; i < nums.size(); i++){ ; ; j < i; j++){ if(nums[i] > nums[j]){ maxval = max(dp[j], maxval); } } dp[i] = maxval + ; maxans = max(dp[…

Codeforces Round #160 (Div. 1) A - Maxim and Discounts 题意 给你n个折扣,m个物品,每个折扣都可以使用无限次,每次你使用第i个折扣的时候,你必须买q[i]个东西,然后他会送你{0,1,2}个物品,但是送的物品必须比你买的最便宜的物品还便宜,问你最少花多少钱,买完m个物品 题解 显然我选择q[i]最小的去买就好了 代码 #include<bits/stdc++.h> using namespace std; const int maxn =…

原题链接在这里:https://leetcode.com/problems/longest-increasing-path-in-a-matrix/ Given an integer matrix, find the length of the longest increasing path. From each cell, you can either move to four directions: left, right, up or down. You may NOT move diag…

Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7 might become 4 5 6 7 0 1 2). You are given a target value to search. If found in the array return its index, otherwise return -1. You may assume no duplic…

题目: Given an unsorted array of integers, find the length of longest increasing subsequence. For example,Given [10, 9, 2, 5, 3, 7, 101, 18],The longest increasing subsequence is [2, 3, 7, 101], therefore the length is 4. Note that there may be more th…

题目链接: 题目 Greatest Common Increasing Subsequence Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) 问题描述 This is a problem from ZOJ 2432.To make it easyer,you just need output the length of the subsequence. 输入 Each sequen…

Another Longest Increasing Subsequence Problem Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://acm.hust.edu.cn/vjudge/problem/visitOriginUrl.action?id=19929 Description Given a sequence of N pairs of integers, find the length of the longest incre…

BC都被hack的人生,痛苦. 下面是题解的表演时间: A. QAQ "QAQ" is a word to denote an expression of crying. Imagine "Q" as eyes with tears and "A" as a mouth. Now Diamond has given Bort a string consisting of only uppercase English letters of leng…

刷题备忘录,for bug-free 招行面试题--求无序数组最长连续序列的长度,这里连续指的是值连续--间隔为1,并不是数值的位置连续 问题: 给出一个未排序的整数数组,找出最长的连续元素序列的长度. 如: 给出[100, 4, 200, 1, 3, 2], 最长的连续元素序列是[1, 2, 3, 4].返回它的长度:4. 你的算法必须有O(n)的时间复杂度 . 解法: 初始思路 要找连续的元素,第一反应一般是先把数组排序.但悲剧的是题目中明确要求了O(n)的时间复杂度,要做一次排序,是不能达…

突然很想刷刷题,LeetCode是一个不错的选择,忽略了输入输出,更好的突出了算法,省去了不少时间. dalao们发现了任何错误,或是代码无法通过,或是有更好的解法,或是有任何疑问和建议的话,可以在对应的随笔下面评论区留言,我会及时处理,在此谢过了. 过程或许会很漫长,也很痛苦,慢慢来吧. 编号 题名 过题率 难度 1 Two Sum 0.376 Easy 2 Add Two Numbers 0.285 Medium 3 Longest Substring Without Repeating C…

题目链接: http://poj.org/problem?id=1239 Increasing Sequences Time Limit: 1000MSMemory Limit: 10000K 问题描述 Given a string of digits, insert commas to create a sequence of strictly increasing numbers so as to minimize the magnitude of the last number. For…

Longest Increasing Subsequences 题目连接: https://www.codechef.com/SNCKPA16/problems/MAKELIS Description 大厨最近了解了经典的最长上升子序列问题.然而,大厨发现,虽然最长上升子序列的长度 是唯一的,但子序列本身却不一定唯一.比如,序列 [1, 3, 2, 4] 的最长上升子序列有两个:[1, 3, 4] 和 [1, 2, 4]. 大厨在这个方向上多做了些研究,然后提出了下面的这个问题: 给定 K,输出…

A. Increasing Sequence 题目连接: http://www.codeforces.com/contest/11/problem/A Description A sequence a0, a1, ..., at - 1 is called increasing if ai - 1 < ai for each i: 0 < i < t. You are given a sequence b0, b1, ..., bn - 1 and a positive integer…

思路还是比较简单的 dp 吧,但是就是想不出来-甚至类似的方程都被自己推翻了 Description Welcome to Innopolis city. Throughout the whole year, Innopolis citizens suffer from everlasting city construction. From the window in your room, you see the sequence of \(n\) hills, where \(i\)-th o…

E. Increasing Frequency 题目链接:https://codeforces.com/contest/1082/problem/E 题意: 给出n个数以及一个c,现在可以对一个区间上的数同时加上或减去一个值,问最后c的最多数量为多少. 题解: 这题挺有意思的,我们通过分析题目可以发现,对于每一个d,如果把[l,r]里面的d都变为c,则最后c的数量为cnt(c,1,l-1)+cnt(c,r+1,n)+cnt(d,l,r). 这个式子变化一下,有:cnt(c,1,n)+cnt(d,…

原题链接在这里:https://leetcode.com/problems/number-of-longest-increasing-subsequence/description/ 题目: Given an unsorted array of integers, find the number of longest increasing subsequence. Example 1: Input: [1,3,5,4,7] Output: 2 Explanation: The two longe…

原题链接在这里:https://leetcode.com/problems/longest-continuous-increasing-subsequence/description/ 题目: Given an unsorted array of integers, find the length of longest continuous increasing subsequence. Example 1: Input: [1,3,5,4,7] Output: 3 Explanation: T…

题目: Given an unsorted array of integers, find the number of longest increasing subsequence. Example 1: Input: [1,3,5,4,7] Output: 2 Explanation: The two longest increasing subsequence are [1, 3, 4, 7] and [1, 3, 5, 7]. Example 2: Input: [2,2,2,2,2] O…

第一次写动态规划的代码,整了一天,终于AC. 题目: Question 1: Is Bigger Smarter? The Problem Some people think that the bigger an elephant is, the smarter it is. To disprove this, you want to take the data on a collection of elephants and put as large a subset of this data…

题目: Given a sequence of integers, find the longest increasing subsequence (LIS). You code should return the length of the LIS. Clarification What's the definition of longest increasing subsequence? The longest increasing subsequence problem is to fin…

A.Regular bracket sequence A string is called bracket sequence if it does not contain any characters other than "(" and ")". A bracket sequence is called regular if it it is possible to obtain correct arithmetic expression by inserting…

A. The Fair Nut and Elevator time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output The Fair Nut lives in nn story house. aiai people live on the ii-th floor of the house. Every person uses elevat…

洛谷 P3902 递增 洛谷传送门 JDOJ 2157: Increasing JDOJ传送门 Description 数列A1,A2,--,AN,修改最少的数字,使得数列严格单调递增. Input 第1 行,1 个整数N 第2 行,N 个整数A1,A2,--,AN Output 1 个整数,表示最少修改的数字 Sample Input 3 1 3 2 Sample Output 1 HINT • 对于50% 的数据,N <= 103 • 对于100% 的数据,1 <= N <= 105…

Codeforces Round #557 (Div. 1) 简要题解 codeforces A. Hide and Seek 枚举起始位置\(a\),如果\(a\)未在序列中出现,则对答案有\(2\)或\(3\)的贡献. 若\(a\)在序列中出现,找到\(a\)第一次出现的位置\(x\),则说明在\(x\)位置之前需要把\(a\)移动到\(a+1\)或\(a-1\)处,只需要判断\(x\)后面有没有\(a+1\),有没有\(a-1\).对每种数字记录第一次和最后一次出现位置即可. code B…

原题链接在这里:https://leetcode.com/problems/increasing-subsequences/ 题目: Given an integer array, your task is to find all the different possible increasing subsequences of the given array, and the length of an increasing subsequence should be at least 2. E…