Find Duplicates with Hashing | Dataford Interview Questions

Given an array of unsorted integers, write an efficient algorithm to find duplicate values using a hash-based approach.

Return each duplicated value once, in the order it is encountered as a duplicate. Define a function that accepts a list of integers and returns a list of integers. Use average O(n) time and O(n) additional space.

Constraints

1 <= nums.length <= 100000
-1000000000 <= nums[i] <= 1000000000
Return unique duplicate values in first duplicate-encounter order

Function Signature

def find_duplicates(nums):

Your question is Find Duplicates with Hashing. Start with the requirements in the Question tab.

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Problem

Given an array of unsorted integers, write an efficient algorithm to find duplicate values using a hash-based approach.

Constraints

1 <= nums.length <= 100000
-1000000000 <= nums[i] <= 1000000000
Return unique duplicate values in first duplicate-encounter order

Function Signature

def find_duplicates(nums):

Your question is Find Duplicates with Hashing. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.