Iterative This problem can also be solved iteratively. Take[1, 2, 3]in the problem statement as an example. The process of generating all the subsets is like: Initially:[[]] Adding the first number to all the existed subsets:[[], [1]]; Adding the second number to all the existed su...
LeetCode78. 子集 ☕ 题目:78. 子集 (leetcode-cn.com/problem) ❓ 难度:中等 描述: 给你一个整数数组 nums ,数组中的元素 互不相同 。返回该数组所有可能的子集(幂集)。 解集 不能 包含重复的子集。你可以按 任意顺序 返回解集。 示例1: 输入:nums = [1,2,3] 输出:[[],[1],[2],[1,2]...
Leetcode 694 Number of Distinct Islands Leetcode 131 Palindrome Partitioning 基于排列组合的DFS: 其实与图类DFS方法一致,但是排列组合的特征更明显 Leetcode 17 Letter Combinations of a Phone Number Leetcode 39 Combination Sum(I, II, III相似, IV为动态规划题目) Leetcode 78 Subsets (I, II 重点在于如...
Lecture 136 Explaining the problem Lecture 137 Pseudocode implementation Lecture 138 Walkthrough over pseudocode Lecture 139 Implementing the code Section 31: Microsoft Trees question: Symmetric Trees (Easy) Lecture 140 Explaining the problem Lecture 141 Intuition behind the problem Lecture 142 Walkthrough ...
Note: All explanations are written in Github Issues, please do not create any new issue or pull request in this project since the problem index should be consistent with the issue index, thanks! ('$' means the problem is locked on Leetcode, '*' means the problem is related to Database...
218 The Skyline Problem 16.20% Hard 217 Contains Duplicate 35.90% Easy 216 Combination Sum III 27.70% Medium 215 Kth Largest Element in an Array 27.30% Medium 214 Shortest Palindrome 16.80% Hard 213 House Robber II 26.30% Medium 212 Word Search II 15.00% Hard 211 Add and Search Word - Dat...
ProblemSolution 315Count of Smaller Numbers After Self 314Binary Tree Vertical Order Traversal☢ 313Super Ugly NumberC 312Burst Balloons 311Sparse Matrix Multiplication☢ 310Minimum Height Trees 309Best Time to Buy and Sell Stock with Cooldown ...
[LeetCode] Valid Number Validate if a given string is numeric. Some examples: "0"=>true " 0.1 "=>true "abc"=>false "1 a"=>false "2e10"=>true Note: It is intended for the problem statement to be ambiguous. You should gather all requirements up front before implementing one....
formula will only consist of letters, digits, and round parentheses, and is a valid formula as defined in the problem. 就是直接解析字符串,然后获取元素的数量 其实我觉得直接按照括号匹配做展开也行,然后遍历统计元素也可以 代码如下: #include <iostream> ...
0218 The Skyline Problem Go 36.0% Hard 0219 Contains Duplicate II Go 38.4% Easy 0220 Contains Duplicate III Go 21.3% Medium 0221 Maximal Square 38.6% Medium 0222 Count Complete Tree Nodes Go 48.7% Medium 0223 Rectangle Area Go 38.1% Medium 0224 Basic Calculator Go 37.9% Hard 0225...