Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. For example,If S = [1,2,3], a solution is: [ [3], [1], [2], [1,2,3], [1…

Given a set of distinct integers, nums, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. For example,If nums = [1,2,3], a solution is: [ [3], [1], [2], [1,2,…

Subsets 题目 Given a set of distinct integers, nums, return all possible subsets. Note: The solution set must not contain duplicate subsets. For example, If nums = [1,2,3], a solution is: [ [3], [1], [2], [1,2,3], [1,3], [2,3], [1,2], []] 思路 一开始的想法首先就是…

根据issac3 用Java总结了backtracking template, 我用他的方法改成了Python. 以下为template. def backtrack(ans, temp, nums, start): # 可能有start, 也可能没有 if len(temp) == len(nums): ans.append(temp) else: for i in range(start, len(nums)): if nums[i] not in temp: backtrack(ans,…

最近在准备找工作的算法题,刷刷LeetCode,以下是我的解题报告索引,每一题几乎都有详细的说明,供各位码农参考.根据我自己做的进度持续更新中......                              本文地址 LeetCode:Reverse Words in a String LeetCode:Evaluate Reverse Polish Notation LeetCode:Max Points on a Line LeetCode:Sort List LeetCode:Ins…

Here is my collection of solutions to leetcode problems. Related code can be found in this repo: https://github.com/zhuli19901106/leetcode LeetCode - Course Schedule LeetCode - Reverse Linked List LeetCode - Isomorphic Strings LeetCode - Count Primes…

Given a collection of integers that might contain duplicates, S, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. For example,If S = [1,2,2], a solution is:…

Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. For example,If S = [1,2,3], a solution is: [ [3], [1], [2], [1,2,3], [1…

求集合的所有子集问题 LeetCode:Subsets Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. For example,If S = [1,2,3], a solution is:…

Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. 就是找出数字的全部子集. 我的思路: 设输入是 1  2  3  4 先把输入从小到大排序 长度 0 : [] 长度 1 : 把输入数据从第一…

子集系列问题: Coding 问题中有时会出现这样的问题:给定一个集合,求出这个集合所有的子集(所谓子集,就是包含原集合中的一部分元素的集合). 或者求出满足一定要求的子集,比如子集中元素总和为定值,子集元素个数为定值等等. 我把它们归类为子集系列问题. leetcode上原题链接: 思路分析: 思路一 可以用递推的思想,观察S=[], S =[1], S = [1, 2] 时解的变化. 可以发现S=[1, 2] 的解就是 把S = [1]的所有解末尾添上2,然后再并上S = [1]里面的原有解…

题目来源 https://leetcode.com/problems/subsets-ii/ Given a collection of integers that might contain duplicates, nums, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate su…

题目来源 https://leetcode.com/problems/subsets/ Given a set of distinct integers, nums, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. 题意分析 Input: :type nums:…

题意: 给一个集合,有n个可能相同的元素,求出所有的子集(包括空集,但是不能重复). 思路: 看这个就差不多了.LEETCODE SUBSETS (DFS) class Solution { public: vector<vector<int>> subsets(vector<int>& nums) { sort(nums.begin(),nums.end()); DFS(,nums,tmp); ans.push_back(vector<int>()…

题意: 给一个集合,有n个互不相同的元素,求出所有的子集(包括空集,但是不能重复). 思路: DFS方法:由于集合中的元素是不可能出现相同的,所以不用解决相同的元素而导致重复统计. class Solution { public: vector<vector<int>> subsets(vector<int>& nums) { sort(nums.begin(),nums.end()); DFS(,nums,tmp); return ans; } void DF…

深度优先搜索算法(depth first search),是一个典型的图论算法.所遵循的搜索策略是尽可能“深”地去搜索一个图. 算法思想是: 对于新发现的顶点v,如果它有以点v为起点的未探测的边,则沿此边继续探测下去.当顶点v的所有边都已被探寻结束,则回溯到到达点v的先辈节点.以相同方法一直回溯到源节点为止.如果图中还有未被发现的顶点,则选择其中一个作为源顶点,重复以上的过程.最后的结果是一些不相交的深度优先树. leetCode中的应用: Given a collection of integ…

Given a collection of integers that might contain duplicates, nums, return all possible subsets. Note: The solution set must not contain duplicate subsets. For example,If nums = [1,2,2], a solution is: [ [2], [1], [1,2,2], [2,2], [1,2], [] ] 题目标签:Arr…

Given a set of distinct integers, nums, return all possible subsets. Note: The solution set must not contain duplicate subsets. For example,If nums = [1,2,3], a solution is: [ [3], [1], [2], [1,2,3], [1,3], [2,3], [1,2], [] ] 题目标签:Array 方法 1: 题目给了我们一…

Given an array of integers nums and a positive integer k, find whether it's possible to divide this array into knon-empty subsets whose sums are all equal. Example 1: Input: nums = [4, 3, 2, 3, 5, 2, 1], k = 4 Output: True Explanation: It's possible…

一天一道LeetCode 本系列文章已全部上传至我的github,地址:ZeeCoder's Github 欢迎大家关注我的新浪微博,我的新浪微博 欢迎转载,转载请注明出处 (一)题目 Given a collection of integers that might contain duplicates, nums, return all possible subsets. Note: The solution set must not contain duplicate subsets. F…

一天一道LeetCode 本系列文章已全部上传至我的github,地址:ZeeCoder's Github 欢迎大家关注我的新浪微博,我的新浪微博 欢迎转载,转载请注明出处 (一)题目 Given a set of distinct integers, nums, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not co…

import java.util.ArrayList; import java.util.Arrays; import java.util.List; /** * Source : https://oj.leetcode.com/problems/subsets/ * * * Given a set of distinct integers, S, return all possible subsets. * * Note: * * Elements in a subset must be in…

Given a collection of integers that might contain duplicates, nums, return all possible subsets (the power set). Note: The solution set must not contain duplicate subsets. Example: Input: [1,2,2] Output: [ [2], [1], [1,2,2], [2,2], [1,2], [] ] 这个题目思路…

Given a collection of integers that might contain duplicates, nums, return all possible subsets (the power set). Note: The solution set must not contain duplicate subsets. Input: [1,2,2] Output: [ [2], [1], [1,2,2], [2,2], [1,2], [] ] 题意: 是的[leetcode…

原题地址:https://oj.leetcode.com/problems/subsets-ii/ 题意: Given a collection of integers that might contain duplicates, S, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicat…

原题地址:https://oj.leetcode.com/problems/subsets/ 题意:枚举所有子集. 解题思路:碰到这种问题,一律dfs. 代码: class Solution: # @param S, a list of integer # @return a list of lists of integer def subsets(self, S): def dfs(depth, start, valuelist): res.append(valuelist) if depth…

题目链接:https://leetcode.com/problems/subsets/#/description   给出一个数组,数组中的元素各不相同,找到该集合的所有子集(包括空集和本身) 举例说明: int []nums={1,2,3}  返回结果如下: [ [3], [1], [2], [1,2,3], [1,3], [2,3], [1,2], [] ] 使用回溯法解决上述问题.   相当于对一棵树的深度遍历操作.    上述的输出结果还是有些规律的,也就是按照子集的元素个数来进行分解,…

目录 题目链接 注意点 解法 小结 题目链接 Subsets II - LeetCode 注意点 有重复的数字 数组可能是无序的,要先排序 解法 解法一:递归,只需要在Subsets中递归写法的基础上多加一句if(find(ret.begin(),ret.end(),tmp) == ret.end()) ret.push_back(tmp);j即可,因为已经排序了,所以加进去的如果已经存在就说明是重复的. class Solution { public: typedef vector<int>…

Given a set of distinct integers, nums, return all possible subsets. Note: Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. For example, If nums = [1,2,3], a solution is: [ [3], [1], [2], [1,2…

1. Word Search Given a 2D board and a word, find if the word exists in the grid. The word can be constructed from letters of sequentially adjacent cell, where "adjacent" cells are those horizontally or vertically neighboring. The same letter cel…