Given an array of integers and an integer k, find out whether there are two distinct indices i an ...
Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element i ...
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Given an array of integers and an integer k, find out whether there are two distinct indices i an ...
Given an array of integers, find out whether there are two distinct indices i and j in the array ...
Contains Duplicate III Given an array of integers, find out whether there are two distinct indices i and j in the array such that the difference ...
Write a SQL query to find all duplicate emails in a table named Person. For example, your query should return the following for the above table ...
Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure ...
Given a binary tree, return all duplicate subtrees. For each kind of duplicate subtrees, you only need to return the root node of any oneof ...
Write a SQL query to delete all duplicate email entries in a table named Person, keeping only unique emails based on its smallest Id. ...
Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure ...