Day 7: Arrays

Objective

Today, we’re learning about the Array data structure. Check out the Tutorial tab for learning materials and an instructional video!

Task

Given an array, A, of N integers, print A‘s elements in reverse order as a single line of space-separated numbers.

Input Format

The first line contains an integer, N (the size of our array).
The second line contains N space-separated integers describing array A‘s elements.

Constraints

• 1 <= N <= 1000
• 1 <= A_i <= 10000, where Ai is the i^th integer in the array.

Output Format

Print the elements of array A in reverse order as a single line of space-separated numbers.

Sample Input

1
2

4
1 4 3 2

##Sample Output

1

2 3 4 1

Solutions

Solution 1

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function main() {
    const n = parseInt(readLine(), 10);

    const arr = readLine().split(' ').map(arrTemp => parseInt(arrTemp, 10));

    console.log(arr.reverse().join(' '));
}

Solution 2

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function main() {
    const n = parseInt(readLine(), 10);

    const arr = readLine().split(' ').map(arrTemp => parseInt(arrTemp, 10));

    const reverseArray = (array) => {
        let temp = null;
        const length = array.length;
        
        for (let i = 0; i < length / 2; i++){
            temp = array[i];
            array[i] = array[length - 1 - i];
            array[length - 1 - i] = temp;
        }

        return array;
    }
    console.log(reverseArray(arr).join(' '));
}