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查询Tags标签： subsequence，共有 15条记录-
LeetCode 673 Number of Longest Increasing Subsequence
Given an integer array nums, return the number of longest increasing subsequences. Notice that the sequence has to be strictly increasing. Solution 我们需要求出最长长度序列的个数。不妨用两个数组 \(dp1, dp2\). 其中 \(dp1[i]\) 表示以 \(i\) 结尾的最长递增…
2022/8/13 6:23:25 人评论 次浏览 -
POJ1458 Common Subsequence
题目链接 题目 Description A subsequence of a given sequence is the given sequence with some elements (possible none) left out. Given a sequence X = < x1, x2, ..., xm > another sequence Z = < z1, z2, ..., zk > is a subsequence of X if there…
2022/8/11 23:25:29 人评论 次浏览 -
LeetCode 376. Wiggle Subsequence
LeetCode 376. Wiggle Subsequence (摆动序列) 题目 链接 https://leetcode.cn/problems/wiggle-subsequence/ 问题描述 如果连续数字之间的差严格地在正数和负数之间交替，则数字序列称为 摆动序列 。第一个差（如果存在的话）可能是正数或负数。仅有一个元素或者含两个不…
2022/6/20 23:22:09 人评论 次浏览 -
【POJ】1458 Common Subsequence
最长公共子序列问题是动态规划的经典问题之一，对于长度分别为n和m的两个序列，若是最后一个元素是一样的，那么我们只需要看长度分别为n-1和m-1的两个序列，若是不一样，则需要比较长度分别为n-1和m的两个序列或者长度分别为n和m-1的两个序列哪个的公共子序列是最长的。 …
2022/2/8 23:22:30 人评论 次浏览 -
c++PTAA1007(dp累加)
Given a sequence of K integers { N 1 , N 2 , …, N K }. A continuous subsequence is defined to be { N i , N i+1 , …, N j } where 1≤i≤j≤K. The Maximum Subsequence is the continuous subsequence which has the largest sum of its elements. For example,…
2022/1/31 17:11:23 人评论 次浏览 -
Python 的 itertools 模块
Python 当中的 itertools 模块的存在感一直不高，可能是大家真正用到的时候并不多。然而，最近它却成功引起了我的注意，它在时大放异彩，所以，不妨再来学一学，不求别的，只求在解决问题的过程当中至少能成功想到它一次。 itertools.combinations 求列表的 k 阶子列 imp…
2021/11/13 11:40:04 人评论 次浏览 -
Python 的 itertools 模块
Python 当中的 itertools 模块的存在感一直不高，可能是大家真正用到的时候并不多。然而，最近它却成功引起了我的注意，它在时大放异彩，所以，不妨再来学一学，不求别的，只求在解决问题的过程当中至少能成功想到它一次。 itertools.combinations 求列表的 k 阶子列 imp…
2021/11/13 11:40:04 人评论 次浏览 -
Odd-Even Subsequence T17 D57
Odd-Even Subsequence T17 D57 Problem - D - Codeforces (Unofficial mirror site, accelerated for Chinese users) 思路 交互题 将每条边按dfs序保存起来。 每次询问一半的边，若询问的值不等于最大值，递归另一半。 参考代码 #include<bits/stdc++.h> #define …
2021/10/7 6:11:34 人评论 次浏览 -
Odd-Even Subsequence T17 D57
Odd-Even Subsequence T17 D57 Problem - D - Codeforces (Unofficial mirror site, accelerated for Chinese users) 思路 交互题 将每条边按dfs序保存起来。 每次询问一半的边，若询问的值不等于最大值，递归另一半。 参考代码 #include<bits/stdc++.h> #define …
2021/10/7 6:11:34 人评论 次浏览 -
376. Wiggle Subsequence
package LeetCode_376/*** 376. Wiggle Subsequence* https://leetcode.com/problems/wiggle-subsequence/* A wiggle sequence is a sequence where the differences between successive numbers strictly alternate between positive and negative.* The first differen…
2021/8/1 23:35:55 人评论 次浏览 -
376. Wiggle Subsequence
package LeetCode_376/*** 376. Wiggle Subsequence* https://leetcode.com/problems/wiggle-subsequence/* A wiggle sequence is a sequence where the differences between successive numbers strictly alternate between positive and negative.* The first differen…
2021/8/1 23:35:55 人评论 次浏览 -
[LeetCode] 1930. Unique Length-3 Palindromic Subsequences
Given a string s, return the number of unique palindromes of length three that are a subsequence of s. Note that even if there are multiple ways to obtain the same subsequence, it is still only counted once. A palindrome is a string that reads the sam…
2021/7/13 6:06:33 人评论 次浏览 -
[LeetCode] 1930. Unique Length-3 Palindromic Subsequences
Given a string s, return the number of unique palindromes of length three that are a subsequence of s. Note that even if there are multiple ways to obtain the same subsequence, it is still only counted once. A palindrome is a string that reads the sam…
2021/7/13 6:06:33 人评论 次浏览 -
674. Longest Continuous Increasing Subsequence
Given an unsorted array of integers nums, return the length of the longest continuous increasing subsequence (i.e. subarray). The subsequence must be strictly increasing. A continuous increasing subsequence is defined by two indices l and r (l < r)…
2021/7/13 6:05:52 人评论 次浏览 -
674. Longest Continuous Increasing Subsequence
Given an unsorted array of integers nums, return the length of the longest continuous increasing subsequence (i.e. subarray). The subsequence must be strictly increasing. A continuous increasing subsequence is defined by two indices l and r (l < r)…
2021/7/13 6:05:52 人评论 次浏览
