Zerab

I think you should file 1040NR or 1040NR-EZ. The F1 is considered a non-resident alien for tax purpose. If you had been here in H1 or other working visas and had met the residency requirement, you would have probably filed 1040 or 1040EZ.

To gain the residency status, one should be in the US for at least 183 days in three years (current tax year with the preceeding two years)