http://www.usaco.org/index.php?page=viewproblem2&cpid=1037

Hi everyone,

I was working on the problem above. I don’t understand how the the x value or the possible cows that can be patient zero is 1 in the sample case. I think x would be 2 because if K = 0, then 1 and 2 can both start infected and not spread the infection.