import math
thoi_gian_con_lai=30
t_tk=20+273.15
while True:
try:
for i in range(5):
t_C=float(input())
t=t_C+273.15
T_ut=thoi_gian_con_lai*math.exp((70000/8.314)*((1/t)-(1/t_tk)))
if round(T_ut,1)<=0:
print("Sản phẩm đã hỏng")
break
else:
thoi_gian_con_lai=T_ut
print(f"Thời gian sử dụng còn lại là {T_ut:.1f}")
except EOFError:
break
aW1wb3J0IG1hdGgKdGhvaV9naWFuX2Nvbl9sYWk9MzAKdF90az0yMCsyNzMuMTUKd2hpbGUgVHJ1ZToKIHRyeToKICBmb3IgaSBpbiByYW5nZSg1KToKICAgdF9DPWZsb2F0KGlucHV0KCkpCiAgIHQ9dF9DKzI3My4xNQogICBUX3V0PXRob2lfZ2lhbl9jb25fbGFpKm1hdGguZXhwKCg3MDAwMC84LjMxNCkqKCgxL3QpLSgxL3RfdGspKSkKICAgaWYgcm91bmQoVF91dCwxKTw9MDoKICAgIHByaW50KCJT4bqjbiBwaOG6qW0gxJHDoyBo4buPbmciKQogICAgYnJlYWsKICAgZWxzZToKICAgIHRob2lfZ2lhbl9jb25fbGFpPVRfdXQKICAgIHByaW50KGYiVGjhu51pIGdpYW4gc+G7rSBk4bulbmcgY8OybiBs4bqhaSBsw6Age1RfdXQ6LjFmfSIpCiBleGNlcHQgRU9GRXJyb3I6CiAgYnJlYWs=