A permutation is each one of the N! Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers. Implement the Next Permutation Algorithm. When we order numbers we want to "increase them by the smallest amount". ). We use analytics cookies to understand how you use our websites so we can make them better, e.g. Next Permutation (2 solutions) éèçº¯ 2014-12-18 åæ. edit close. Rearranges the elements in the range [first,last) into the next lexicographically greater permutation. Step 3: Swap A[k] and A[l]. If you had some troubles in debugging your solution, please try to ask for help on StackOverflow, instead of here. We can view the elements as digits and the permutations as numbers. During an interview, the interviewer will not be looking for the above solution. Array. If not exist, this is the last permutation. possible arrangements the elements can take (where N is the number of elements in the range). link If such arrangement is not possible, it must rearrange it as the lowest possible order (ie, sorted in ascending order). OK! Viewing the problem in this way we want to order the permutations/numbers in "ascending" order. Step 2: Find the largest index l, such that A[l]>A[k]. tl;dr: Please put your code into a