importjava.util.*;publicclassLeetCode{publicstaticvoidmain(String[] args){ Scanner sc=newScanner(System.in);intn=Integer.parseInt(sc.nextLine());int[][] matrix=newint[n][n];for(inti=0;i<n;i++){ String str=sc.nextLine(); String[] strs=str.split(" |,");for(intj=0;j<n;j++)...
47. Permutations II # 题目 # Given a collection of numbers that might contain duplicates, return all possible unique permutations. Example: Input: [1,1,2] Output: [ [1,1,2], [1,2,1], [2,1,1] ] 题目大意 # 给定一个可包含重复数字的序列,返回所有不重复的
return vector<vector<int>>(ret.begin(),ret.end());这种写法是对的。在leetcode里面只能用有序集合。否则用unordered_set报错:需要实现特定的hash函数。 error: static assertion failed: hash function must be invocable with an argument of key type classSolution{public: vector<vector<int>>permuteUnique(...
又是把所有满足条件的结果存到一个ArrayList里面, 之前也有类似的如Letter combination of a Phone Number这道题。这种类型的题其实形成了一个套路,套路就是,recursion参数包括最终结果的集合(ArrayList),input(String),递归层次level(int),某一条具体的路径Path,当前外部环境 一般来说是:ArrayList<ArrayList<>>, Arra...
Leetcode 47 Permutations II dfsduplicatesnumbersreturnunique Given a collection of numbers that might contain duplicates, return all possible unique permutations. For example, [1,1,2] have the following unique permutations: [ [1,1,2], [1,2,1], [2,1,1] ] 和46题差不多,区别是有重复元素...
https://www.geeksforgeeks.org/write-a-c-program-to-print-all-permutations-of-a-given-string/
leetcode[47] Permutations II Given a collection of numbers that might contain duplicates, return all possible unique permutations. Example: Input: [1,1,2] Output: [ [1,1,2], [1,2,1], [2,1,1] ] 题目大意: 给一个数组含有重复数字,找出他们所有不重复的全排列。
3. 交换替换数与A,然后反转替换点后面的序列 4. 步骤1中如果没有找到,直接反转整个序列 leetcode中Permutation Sequence, Permutations II ,Next Permutation均使用上面的算法,代码如下: class Solution { public: //没有重复的情况 vector<vector<int> > permute(vector<int> &num) { ...
Leetcode: Permutations Given a collection of numbers,returnall possible permutations. For example, [1,2,3] have the following permutations: [1,2,3], [1,3,2], [2,1,3], [2,3,1], [3,1,2], and [3,2,1]. Analysis: 这道题跟N-Queens,Sudoku Solver,Combination Sum,Combinations,...
一、开篇Permutation,排列问题。这篇博文以几道LeetCode的题目和引用剑指offer上的一道例题入手,小谈一下这种类型题目的解法。二、上手最典型的permutation题目是这样的:Given a collection of numbers, return all possible p