2] have the following unique permutations: [ [1,1,2], [1,2,1], [2,1,1] ] """ def permute_unique(nums): perms = [[]]
2] have the following unique permutations: [ [1,1,2], [1,2,1], [2,1,1] ] """ def permute_unique(nums): perms = [[]]
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Given a collection of numbers that might contain duplicates,
return all possible unique permutations.
For example,
[1,1,2] have the following unique permutations:
[
[1,1,2],
[1,2,1],
[2,1,1]
]
"""
def permute_unique(nums):
perms = [[]]
for n in nums:
new_perms = []
for l in perms:
for i in range(len(l)+1):
new_perms.append(l[:i]+[n]+l[i:]).
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