Contains Duplicate

Easy

arrayhash-tablesorting

Given an integer array nums, return true if any value appears at least twice, and false if every element is distinct.

Input: one line of space-separated integers. Output: true or false.

Example 1

Input:

1 2 3 1

Output:

true

1 appears twice.

Example 2

Input:

1 2 3 4

Output:

false

All distinct.

Run your code against the sample tests, or Submit to run the full suite.

Easy

arrayhash-tablesorting

Given an integer array nums, return true if any value appears at least twice, and false if every element is distinct.

Input: one line of space-separated integers. Output: true or false.

Example 1

Input:

1 2 3 1

Output:

true

1 appears twice.

Example 2

Input:

1 2 3 4

Output:

false

All distinct.

Run your code against the sample tests, or Submit to run the full suite.