cdf96ca38ed0b8eee2ec616dc706d63fb72256dd fcbc2f69a4c7db3f81f1559322bf9b6dc399d7b5 Arya Zhao <lz2650@columbia.edu> 1614220639 -0800	pull: fast-forward
fcbc2f69a4c7db3f81f1559322bf9b6dc399d7b5 2dcc2115f371980cef41f21e5ef5adcbfc8606a9 Arya Zhao <lz2650@columbia.edu> 1614228368 -0800	pull: fast-forward
2dcc2115f371980cef41f21e5ef5adcbfc8606a9 230e61b39f7a0e179ba5d846b5f0bfb867534daa Arya Zhao <lz2650@columbia.edu> 1619472107 -0700	pull: fast-forward
230e61b39f7a0e179ba5d846b5f0bfb867534daa 9ccb29815adfc30b75735e49a9506aac64b67c18 Arya Zhao <lz2650@columbia.edu> 1619486674 -0700	update by push
