minimumMovement.js

function minimumMovement(obstacleLanes) {
    // Write your code here
    // console.log(obstacleLanes)
    let currentLine = 2;
    let total_move = 0;
    var len = obstacleLanes.length;
    var i = 0
    for (i = 0; i < len; i++) {

        let element = obstacleLanes[i]
        let next = obstacleLanes[i + 1]

        if (currentLine == element) { // have to move +1 or -1
            total_move = total_move + 1

            temp = obstacleLanes.slice(i + 1, )
            console.log(temp);
            if (!temp.includes(element)) {
                return total_move
            }

            if (next == 3) {
                currentLine = currentLine - 1 // have to move middle lane from 3
            } else if (next == 1) {
                currentLine = currentLine + 1 // have to move middle land from 1
            }
        }
    }

    // console.log(total_move)
    return total_move
}

input = [2, 3, 2, 1, 3, 1]
console.log(minimumMovement(input))

input = [3, 2, 2, 1, 2, 1]
console.log(minimumMovement(input))

input = [2, 1, 3, 3, 3, 1]
console.log(minimumMovement(input))

input = [3, 2, 2, 1, 2, 1]
console.log(minimumMovement(input))

input = [1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3, 1, 2, 3]
console.log(minimumMovement(input))