Round 1 Confusion

Hey congratulate you all for qualified upto final Round, but this is not the end, final round it still remaining for that you need to crack some more problems. So here we go. Our team is in confusion that how to work efficiect in given period of time. There are total $N$ paper's out of which $X$ are already checked and there are total $K$ crew members to check the paper's. But now we want to div