One day,ZYB participated in the BestCoder Contest
There are four problems. Their scores are 1000,1500,2000,2500
According to the rules of BestCoder,If you solve one problem at $x$ minutes,
You will get (250-x)/250$*$100$\%$ of the original scores.
Obviously the final score must be an integer,becasue the original scores are multiple of 250
And if you make $x$ wrong submissions,the score of this problem you get will be reduced by 50$*$x
For example, if you solved the first problem in 5 minutes and you make one wrong submisson, the score of this problem is 980-50=930
To prevent very low scores,the lowest score of one problem is $40\%$ of its original score