“Given an integer array nums, return all the different possible non-decreasing subsequences of the given array with at least two elements. You may return the answer in any order.” 我的代码是这样的: /* * @lc app=leetcode.cn id=491 lang=cpp * * [491] Non-decreasing Subsequences */#...
题意: 戳这里查看 分析: 我们先不考虑区间的限制设出DP状态,$f[i][j]$表示枚举到第$i$个数,单调不降序列最后一位是$j$的方案数 转移方程就是: if(a[i]!=j) f[i][j]=f[i-1][j] else f[i][j]=f[i-1][k](k<=j) 我们发现可以用矩
Given an integer arraynums, returnall the different possible non-decreasing subsequences of the given array with at least two elements. You may return the answer inany order. Example 1: Input:nums = [4,6,7,7]Output:[[4,6],[4,6,7],[4,6,7,7],[4,7],[4,7,7],[6,7],[6,7...
1.在左/右区间,直接递归下去; 2.跨越中间,那么处理出两个数组:L[i][j]表示左区间在开头第i个位置,以数字j为结尾的上升子序列个数(不跨越mid),右区间同理 (L和R的计算很简单,只需要再处理出一个L[i][j][k]表示i后面以j为开头,以k为结尾的子序列个数即可) 对其求前/后缀和,那么就求出了开头在第...
Non-decreasing subsequenceRamsey's theoremReverse mathematicsEvery function over the natural numbers has an infinite subdomain on which the function is non-decreasing. Motivated by a question of Dzhafarov and Schweber, we study the reverse mathematics of var......
Luogu P6009 [USACO20JAN]Non-Decreasing Subsequences P Link 先考虑计算\(l=1,r=n\)时的答案。 很显然我们可以dp,设\(f_{i,j}\)表示考虑前\(i\)个数,NDS末尾为\(j\)的方案数,那么转移为: \[f_{i,j}= \begin{cases} f_{i-1,j}&j\ne a_i\\ f_{i-1,j}+\sum\limits_{l=1}^{...
If basic data are not presented as a few Ordered SubSequences which we will name OSS too, such OSS should be got, that is be split by any way. Let us say, the relatively small sequence of casual data are sorting out in memory by anything comfortable for these aims algorithm, for ...
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491. Non-decreasing 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. Example: Input: [4, 6, 7, 7] Output: [[4, 6], [4, 7], ...
[loj3247]Non-Decreasing Subsequences 2020-01-27 13:08 −... PYWBKTDA 0 419 Distinct Subsequences 2019-12-21 22:09 −Description Given two strings S and T. Count the number of distinct subsequences of S which equals T. A subsequence ... ...