C : battery
Diff : Easy-Normal -> Normal(3 -> 5)
Comment :
When I see it : Oh, priority_queue!
When I see "n<=1000000" : …?
(Win+R calc ln(1000000) / ln(2) * powten(6) = 19931568…….) : Oh, OK.
Final : 50/100
My idea : DO NOT USE STL-PRIORITY_QUEUE AGAIN.