Total Score

There are $K$ problems in a contest with $N$ participants. All the problems don't necessarily have the same points assigned to them - you are given an array $A$ of integers, where $A_i$ denotes the points assigned to the $i^{th}$ problem. If a participant solves the $i^{th}$ problem, they will get $A_i$ points added to their total score. Note that there are no partial points - they can get only $0