def simplify_path(path):
    """
        simplifying a given path
    """
    folders = path.split("/")
    new_folders = []
    for folder in folders:
        if folder == "" or folder == ".":
            continue
        elif folder == "..":
            try:
                if new_folders[-1] != "..":
                    new_folders.pop()
                else:
                    new_folders.append("..")
            except IndexError:
                if path[0] == "/":
                    print("you can't go deeper than root folder")
                else:
                    new_folders.append("..")
        else:
            new_folders.append(folder)
    new_folders = "/".join(new_folders)
    if not path[0].isalpha() and path[0] != ".":
        new_folders = path[0] + new_folders
    if len(new_folders) == 0:
        new_folders = "."
    print(new_folders)
    return new_folders


if __name__ == '__main__':
    # These "asserts" using only for self-checking and not necessary for auto-testing

    # last slash is not important
    assert simplify_path('/a/') == '/a'

    # double slash can be united in one
    assert simplify_path('/a//b/c') == '/a/b/c'

    # double dot - go to previous folder
    assert simplify_path('dir/fol/../no') == 'dir/no'
    assert simplify_path('dir/fol/../../no') == 'no'

    # one dot means current dir
    assert simplify_path('/a/b/./ci') == '/a/b/ci'
    assert simplify_path('vi/..') == '.'
    assert simplify_path('./.') == '.'

    # you can't go deeper than root folder
    assert simplify_path('/for/../..') == '/'
    assert simplify_path('/for/../../no/..') == '/'

    # not all double-dots can be simplyfied in related path
    assert simplify_path('for/../..') == '..'
    assert simplify_path('../foo') == '../foo'

    assert simplify_path(".././..") == "../.."
    print('Simply enough! Let\'s check it now!!')