In the tale, there was a great wizard at SUSTech called SUSTechDaFaShi with excellent power. With his great power, DFS led a scourge army with \(n\) ultimate soldiers. Each soldier has 2 attributes, hp and attack. What's more, DFS can cast at most \(p\) times of spell1 to make **one** soldier double its hp, and at most \(q\) times of spell2 to make **one **soldier's attack equal to its hp. DFS wants to know the maximum sum of the attack of all his soldiers after casting two kinds of spells.