s = input()
s_splitted = list(s)

if(s_splitted[len(s_splitted)-1] == "1"):
	s_splitted[len(s_splitted)-1] == "0"
elif(s_splitted[len(s_splitted)-1] == "0"):
	s_splitted[len(s_splitted)-1] == "0"

result = join(s_splitted)
print(result)