Given two strings s1 and s2, write a function to return true if s2 contains the permutation of s1. In other words, one of the first string's permutations is the substring of the second string. Example 1: Input:s1 = "ab" s2 = "eidbaooo" Output:True Explanation: s2 contains one per...
Kth Largest Number in a Stream (medium) ‘K’ Closest Numbers (medium) Maximum Distinct Elements (medium) Sum of Elements (medium) Rearrange String (hard) 13. Pattern: K-way merge,多路归并 K路归并能帮咱们解决那些涉及到多组排好序的数组的问题。 每当你的输入是K个排好序的数组,你就可以用堆...
Given two strings s1 and s2, write a function to return true if s2 contains the permutation of s1. In other words, one of the first string's permutations is the substring of the second string. Example 1: Input: s1 = "ab" s2 = "eidbaooo" Output: True Explanation: s2 contains one ...
permutations(nums)) 11.3 和为K 的子数组(前缀和 + 哈希表优化) 给你一个整数数组nums和一个整数 k,请你统计并返回该数组中和为 k的连续子数组的个数 。mp记录每一个节点的前缀和。用当前前缀和减去目标值的结果,去查寻有多少个前缀和等于这个结果。
Given a string containing only digits, restore it by returning all possible valid IP address combinations. For example: Given”25525511135”, return[“255.255.11.135”, “255.255.111.35”]. (Order does not matter) 这道题要求我们复原IP地址。
The set [1,2,3,…,n] contains a total of n! unique permutations. By listing and labeling all of the permutations in order, we get the following sequence for n = 3: “123” “132” “213” “231” “312” “321” Given n and k, return the kth permutation sequence. ...
1154 Day of the Year 50.10% Easy 1153 String Transforms Into Another String $ 35.60% Hard 1152 Analyze User Website Visit Pattern $ 43.20% Medium 1151 Minimum Swaps to Group All 1's Together $ 51.90% Medium 1150 Check If a Number Is Majority Element in a Sorted Array $ 57.10% Easy 114...
447.Number-of-Boomerangs (E+) 438.Find-All-Anagrams-in-a-String (M+) 356.Line-Reflection (H-) 594.Longest-Harmonious-Subsequence (M+) 532.K-diff-Pairs-in-an-Array (E+) 446.Arithmetic-Slices-II-Subsequence (H) 128.Longest-Consecutive-Sequence (H-) 753.Cracking-the-Safe (H) 890....
0432 All O`one Data Structure 32.4% Hard 0433 Minimum Genetic Mutation Go 41.8% Medium 0434 Number of Segments in a String 37.7% Easy 0435 Non-overlapping Intervals Go 42.9% Medium 0436 Find Right Interval Go 45.4% Medium 0437 Path Sum III Go 46.5% Medium 0438 Find All Anagrams ...
【题目】Given a binary tree, return the postorder traversal of its nodes’ values. For example: Given binary tree {1,#,2,3}, 代码语言:javascript 代码运行次数:0 运行 复制 1 \ 2 / 3 return [3,2,1]. Note: Recursive solution is trivial, could you do it iteratively? 【解答...