Does usaco count the most recent submit or best submit

I just did the usaco bronze and did really well but i accidentally submitted a last second bad attempt on the first question. I was wondering if usaco took the best or recent attempt. Im from australia and our system takes the best attempts so im scared as my score is definitely good enough to pass.

  • If, over time, you submit more than one solution for a single problem, only the LAST one submitted will be graded.