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Deque Reverse

Published at25 Jul 2026
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Deque Easy 0 views
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Reverse the order of elements in a deque (array). The front becomes the back and vice versa.

Example Input & Output

Example 1
Input
[10,20,30]
Output
[30,20,10]
Explanation

Three elements

Example 2
Input
[1,2]
Output
[2,1]
Explanation

Two elements

Example 3
Input
[1,2,3,4,5]
Output
[5,4,3,2,1]
Explanation

Reverse order

Example 4
Input
[1]
Output
[1]
Explanation

Single

Example 5
Input
[]
Output
[]
Explanation

Empty

Algorithm Flow

Recommendation Algorithm Flow for Deque Reverse
Recommendation Algorithm Flow for Deque Reverse

Solution Approach

function solution(arr) {
  return arr.slice().reverse();
}

Best Answers

java
class Solution {
    public int[] solution(int[] nums) {
        int n=nums.length;int[] r=new int[n];
        for(int i=0;i<n;i++)r[i]=nums[n-1-i];
        return r;
    }
}