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Problem: Permutations II

Medium
30 min
Explore how to generate every unique permutation from an integer list with possible duplicates. This lesson helps you understand the problem constraints and guides you through implementing an efficient backtracking solution that avoids redundant permutations while considering time and space complexity.

Statement

For a given integer list, nums, which might contain duplicates, return all possible unique permutations derived from nums.

Note: The order in which the permutations appear doesn’t matter.

Constraints:

  • 1≤1 \leq nums.length ≤8\leq 8

  • −10≤-10 \leq nums[i] ≤10\leq 10

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Problem
Ask
Submissions
Home
Courses
Grokking the Coding Interview Patterns

Problem: Permutations II

Medium
30 min
Explore how to generate every unique permutation from an integer list with possible duplicates. This lesson helps you understand the problem constraints and guides you through implementing an efficient backtracking solution that avoids redundant permutations while considering time and space complexity.

Statement

For a given integer list, nums, which might contain duplicates, return all possible unique permutations derived from nums.

Note: The order in which the permutations appear doesn’t matter.

Constraints:

  • 1≤1 \leq nums.length ≤8\leq 8

  • −10≤-10 \leq nums[i] ≤10\leq 10

Similar Problems
Longest Increasing Subsequence
Sum of Two Integers
Majority Element
Unique Paths
Longest Palindromic Substring
Number of Provinces
Linked List Cycle II
Minimum Flips to Make the Binary String Alternate
Lemonade Change
House Robber