02.Add and Remove

function addAndRemove(arr) {

    let result = [];

    for (let i = 0; i < arr.length; i++) {

        if (arr[i] === 'remove') {

            result.pop();

        } else if (arr[i] === 'add') {

            result.push(i + 1);

        }

    }



    if (result.length === 0) {

        console.log('Empty');

    } else {

        console.log(result.join(' '));

    }

}
 addAndRemove(['add','add','remove','add','add']);