there n beautiful skyscraper New York height ith h_i today villain set fire n 1 safety build nth skyscraperLets jump ith skyscraper jth j discrete skyscraper strictly lower high Formally jump discrete j follow condition satisfy 1 j maxh_i 1 ldot h_j 1 minh_i h_j maxh_i h_j minh_i 1 ldot h_j 1 at moment Vasya staying skyscraper want live little long goal reach nth skyscraper minimal count discrete jump help calcualte number