1vata

monney_need = float(input())
months = int(input())
end_months_monney = 0
# current_monney = 0
total_money = 0
for every_month in range(months):
    end_months_monney += monney_need * 0.25
    if not months % 2 == 0 and months != 1:
        end_months_monney -= monney_need * 0.16
    elif months % 4 == 0:
        end_months_monney += end_months_monney *0.25

total_money = end_months_monney - monney_need

if total_money >= monney_need:
    print(f"Bravo! You can go to Disneyland and you will have {total_money}lv. for souvenirs")
else:
    print(f"Sorry. You need{total_money}lv. more")