sss

function solve(input = []) {

    let newArr = [];
    let num = 0;
    for (let i = 0; i <= input.length; i++) {

        if (input[i] === 'add') {
            num++;
            newArr.push(num);
        }

        else if (input[i] === 'remove') {
            num++;
            newArr.pop(i)
        }

        else if (input[i] === 'remove') {
            console.log('Emty');
            break;
        }

}

console.log(newArr.join(' '));
}

solve(['remove', 'remove', 'remove'])