<|im_start|>system
You are a helpful assistant. You first think about the reasoning process in the mind and then provide the user with the answer. You should try to truely solve the question by yourself without cheating.  <|im_end|>
<|im_start|>user
 95 white and black tiles will be used to form a square pattern. If there must be at least one black tile in every row and at least one white tile in every column, the maximum difference between the number of black and white tiles that can be used is 85. What is the length of each side of the square pattern? Show your work in <think> </think> tags. And return the final answer in <answer> </answer> tags.<|im_end|>
<|im_start|>assistant
Let me solve this step by step.
<think>
user
5
95 white and black tiles will be used to form a square pattern. If there must be at least one black tile in every row and at least one white tile in every column, the maximum difference between the number of black and white tiles that can be used is 85. What is the length of each side of the square pattern?
test