wh=int(input("Enter Working Hours"))
wage=0;
if(wh<=8):
    wage=100
elif(wh<=12):
    wage=100+((wh-8)*30)
elif(wh<=16):
    wage=100+((wh-8)*30)+((wh-12)*40)
elif(wh<=20):
    wage=100+((wh-8)*30)+((wh-12)*40)+((wh-16)*50)
elif(wh>20):
    wage=100+((wh-8)*30)+((wh-12)*40)+((wh-16)*50)+((wh-20)*60)

print("Wage=%.2f" %wage)