02. Bike Race

# 02. Bike Race
juniors_trail_taxes = 5.50
juniors_cross_taxes = 8
juniors_downhill_taxex = 12.25
juniors_road_taxex = 20

seniors_trail_taxex = 7
seniors_cross_taxex = 9.50
seniors_downhill_taxex = 13.75
seniors_road_taxex = 21.50

juniors = int(input())
seniors = int(input())
category = input()
all = seniors +  juniors

if category == "trail":
    sum = (juniors_trail_taxes * juniors) + (seniors * seniors_trail_taxex)
    percent = sum - (sum * 0.05)
    print(f"{percent:.2f}")
elif category == "cross-country":
    if all < 50:
        sum = (juniors_cross_taxes * juniors) + (seniors * seniors_cross_taxex)
        percent = sum - (sum * 0.05)
        print(f"{percent:.2f}")
    elif all >= 50:
        juniors_cross_taxes = juniors_cross_taxes - (juniors_cross_taxes * 0.25)
        seniors_cross_taxex = seniors_cross_taxex - (seniors_cross_taxex * 0.25)
        sum = (juniors_cross_taxes * juniors) + (seniors * seniors_cross_taxex)
        percent = sum - (sum * 0.05)
        print(f"{percent:.2f}")
elif category == "downhill":
    sum = (juniors_downhill_taxex * juniors) + (seniors * seniors_downhill_taxex)
    percent = sum - (sum * 0.05)
    print(f"{percent:.2f}")
elif category == "road":
    sum = (juniors_road_taxex * juniors) + (seniors * seniors_road_taxex)
    percent = sum - (sum * 0.05)
    print(f"{percent:.2f}")