4. Practice Recursion 4. 练习递归 Many linked list problems, like reversing in groups, can be elegantly solved using recursion.许多链表问题,例如分组反转,都可以使用递归来优雅地解决。 Understand how to convert recursive solutions to iterative ones and vice versa.了解如何将递归解决方案转换为迭代解决方...
leetcode-递归问题-传送门: https://leetcode-cn.com/tag/recursion/problemset/
Recursion is the best friend of tree-related problems. 一是只要遇到字符串的子序列或配准问题首先考虑动态规划DP,二是只要遇到需要求出所有可能情况首先考虑用递归。 93 -restore IP address 注: A。在return条件之前先判断valid的条件 1, max bits per partition[size() - startIndex <= (4 - parts) * ...
res += recursionPathSum(node.right, prefixSumCount, target, currSum); // 4.回到本层,恢复状态,去除当前节点的前缀和数量 prefixSumCount.put(currSum, prefixSumCount.get(currSum) - 1); return res; } } 作者:burning-summer 链接:https://leetcode-cn.com/problems/path-sum-iii/solution/qian-z...
Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. 题解: Method 1: recursion, stop condition: 一条list 空了,返回另外一条。否则比较两个node value, 取小的,对应的点后移,next 指向用作下次比较返回...
提到算法,绕不开的重点和难点就肯定会包括动态规划 -- DP,本文就把经典的DP问题按照分类列一下,大家可以按照Recursion,Top-Down,Bottom-Up三种方式都练一练。俗话说,熟能生巧,多练才是提高算法的不二法宝。 课程详细的内容,可以参考这里: 该门课程中, 作者将DP的题目分成以下五个大类: 1. 0/1 Knapsack, ...
linked list Recursion Two Pointers 26 Remove Duplicates from Sorted Array 1 3 array Two Pointers 27 Remove Element 1 4 array Two Pointers 28 Implement strStr() 4 5 string Two Pointers KMP rolling hash 29 Divide Two Integers 4 3 Binary Search Math 30 Substring with Concatenation of All Words...
https://leetcode.com/problems/scramble-string/discuss/29396/Simple-iterative-DP-Java-solution-with-explanation https://leetcode.com/problems/scramble-string/discuss/29394/My-C%2B%2B-solutions-(recursion-with-cache-DP-recursion-with-cache-and-pruning)-with-explanation-(4ms) ...
Recursion 087.Scramble-String (H-) 133.Clone-Graph (M+) 213.House-Robber-II (H-) 337.House-Robber-III (M+) 2378.Choose-Edges-to-Maximize-Score-in-a-Tree (H-) 390.Elimination-Game (H) 395.Longest-Substring-with-At-Least-K-Repeating-Characters (H) 397.Integer-Replacement (M+) 761...
Recursion #TitleSolutionTimeSpaceDifficultyTagNote 2613 Beautiful Pairs C++ Python O(n) on average O(n) Hard 🔒, variant of SPOJ - Closest Point Pair Random Algorithms, Divide and Conquer, Merge Sort, Segment Tree ⬆️ Back to Top Binary Search #TitleSolutionTimeSpaceDifficultyTagNote 2064...