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 T_ut<= 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
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