For simplicity, assume all characters are unique. / Generator of all permutations of an array of anything. Example: Design an algorithm to print all permutations of a string. Linq: 36288000 items in 50051 millisecs using System Just as comparison of this with a Linq implementation for 10! (code included): Here is the steps to implement string permutations: Take out the first char and keep it constant. According to Heap's algorithm in Wikipedia, it should be the fastest. If performance and memory is an issue, I suggest this very efficient implementation. Static string swap(int currentPosition, int targetPosition, string temp)Īrr = arr Obviously the longer the string or array, the longer it takes to generate all the permutations. For example, the string ABC has 6 permutations, i.e., ABC, ACB, BAC. If (!first.Contains(init + s1)) first.Add(init + s1) įor (int i = 1 i generateWords(string test) The class can take either a string or an array, and returns a Generator object which can be iterated over with foreach. This post will find all permutations of a string containing all distinct characters in C++. Solution package main import fmt // Perm. Example 1: Input: ABC Output: ABC ACB BAC BCA CAB CBA Explanation: Given string ABC has permutations in 6 forms as ABC, ACB, BAC, BCA, CAB and CBA. Implement the perm() function that accepts a slice or string and prints all possible combinations of characters. The task is to print all unique permutations of the given string in lexicographically sorted order. String restOfbody = s.Substring(1, s.Length - 1) Permutations of a given string Medium Accuracy: 34.65 Submissions: 230K+ Points: 4 Given a string S. I found the pseudocode on : makePermutations(permutation)
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