Problem 2456. remove single elements

Given a vector of integers, remove the elements that have appeared only once. The output elements should be in exact order as the input except the single elements being removed.
Example:
Input: vec = [2 2 1 2 3 4 1 2];
Output: [2 2 1 2 1 2];
Loops are not allowed.

Solution Stats

30.83% Correct | 69.17% Incorrect
Last Solution submitted on May 21, 2024

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