Qpwoeirut take architecture ambitiously decide remodel cityqpwoeirut city describe row n building ith 1 le le n h_i floor high you assume height floor problem equal therefore building tall build j number floor h_i build large number floor h_j building jbuilde cool tall building i1 building i1 exist Note 1st nth building coolTo remodel city Qpwoeirut need maximize number cool building to Qpwoeirut build additional floor building tall Note remove exist floorssince build new floor expensive Qpwoeirut want minimize number floor builds find minimum number floor Qpwoeirut need build order maximize number cool building