def overlapping(bins):
    """
    Given a sorted list bins, check whether any are overlapping [....{;;;]----}.
    Touching is OK: [....]{----}"""
    s, e = 0, 0
    for b in bins:
        if s < b[1] and b[0] < e:
            return True
        s, e = b[0], b[1]
    return False