If a string contains duplicate characters and we try to generate the permutations of the string (i.e., permutations of all the characters in the string, where n=r in nPr), then duplicate permutations ...

- 1) to different permutations. A recursive approach (which is what I would use) would involve breaking the problem into isomorphic subproblems: to find all permutations of a string, find all ...

You are given a string 'STR' consisting of lowercase English letters. Your task is to return all permutations of the given string in lexicographically increasing order. String A is lexicographically ...