Using the sliding window approach we can solve this problem. A general approach to backtracking questions in Java (Subsets, Permutations, Combination Sum, Palindrome Partioning) issac3. Like in the above example s2 contains the s1 as a substring so we can say s2 contains the permutation of s1 because we see clearly in s2 contains ba which is of the same length as well as contains the same letters a and b as in s1. View undefineds solution of Permutations on LeetCode, the worlds largest programming community. Permutations Question: Given a collection of distinct integers, return all possible permutations. It is a very nice problem as it touches the most important topics in algorithms such as recursion, backtracking. Basically, a permutation of a string is a string that has the same letters in a different order(can or cannot be the same) provided that length of both strings is the same. Our task is to find whether s2 contains the permutation of s1 if yes then return true otherwise false. The problem is we are given two strings let's say s1 = "ab" and s2 = "eidbaooo". Can you solve this real interview question Permutations II - Given a collection of numbers, nums, that might contain duplicates, return all possible unique. Given a collection of numbers, nums, that might contain duplicates, return all possible unique permutations in any order. In other words, return true if one of s1's permutations is the substring of s2. ![]() Problem statement: Given two strings s1 and s2, return true if s2 contains a permutation of s1, or false otherwise. A permutation also called an arrangement number or order, is a rearrangement of the elements of an ordered list S into a one-to-one correspondence with S itself.
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