-1
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What is $(-1)^{1001}$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
-1
What is $(-1)^{1001}$?
train