Alein invasion by NASA

NASA went for a space mission to conquer a planet filled with aliens.We can only invade that planet if we break more than $10^9$ alien building else humans loose. There are $A$ alien stations numbered from 1 to $10^{18}$ i.e, $A_i=i$. If $P_i$ denotes power of $ith$ building, then $ P_i = \lceil{\frac{2A_i+M}{K}}\rceil$ Where $\lceil n \rceil$ denotes ceiling of number $n$ and $M,K$ are integer