Main Entrance

To make a successful $Money$ $Heist$, $Berlin$ takes charge of the safety of main entrance. He must eliminate **‘N’** soldiers who are trying to break the entrance of the bank hall. Each $i-th$ soldier has strength of $a_i$. In one move, he can do either of the following: - Shoot down at most any **‘K’** soldiers. In other words, he can shoot down any set of soldiers such that the size of tha