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Data Structures & Algorithms using Rust: Remove Duplicates from Sorted Array

Sivakumar
Learning rust
Updated on ・1 min read

As part of Data Structures and Algorithms implementation using Rust, today we will explore Remove Duplicates from Sorted Array problem.

Leetcode problem link: https://leetcode.com/problems/remove-duplicates-from-sorted-array/

Problem Statement
Given a sorted array nums, remove the duplicates in-place such that each element appears only once and returns the new length.

Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory.
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Instructions
Example 1:

Input: nums = [1,1,2]
Output: 2, nums = [1,2]
Explanation: Your function should return length = 2, with the first two elements of nums being 1 and 2 respectively. It doesn't matter what you leave beyond the returned length.
Example 2:

Input: nums = [0,0,1,1,1,2,2,3,3,4]
Output: 5, nums = [0,1,2,3,4]
Explanation: Your function should return length = 5, with the first five elements of nums being modified to 0, 1, 2, 3, and 4 respectively. It doesn't matter what values are set beyond the returned length.


Constraints:

0 <= nums.length <= 3 * 104
-104 <= nums[i] <= 104
nums is sorted in ascending order.
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Solution

Please find below the solution implemented using Rust

impl Solution {
    pub fn remove_duplicates(nums: &mut Vec<i32>) -> i32 {
        nums.dedup();
        nums.len() as i32
    }
}
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Happy reading!!!

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