Before revision:  Our main result is a 3-approximation ( in expectation ) algorithm that runs in O(\log \lambda \cdot  \log \log n)  MPC rounds in the sublinear memory regime .
After revision:  Our main result is a 3-approximation ( in expectation ) algorithm that runs in O(\log \lambda \cdot \log \log n) MPC rounds in the strongly sublinear memory regime .