Add and Remove

function addAndRemove(arr) {
    let result = []
    for (let i = 0; i < arr.length; i++) {
        if (arr[i] === 'add') {
            result.push(i + 1)
        } else if (arr[i] === 'remove') {
            result.pop();
        }
    }
    if (result.length > 0) {
        console.log(result.join(' '))
    } else {
        console.log(`Empty`)
    }
}