CF296B Yaroslav and Two Strings

Yaroslav thinks that two strings $ s $ and $ w $ , consisting of digits and having length $ n $ are non-comparable if there are two numbers, $ i $ and $ j $ $ (1

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The first test contains no question marks and both strings are incomparable, so the answer is $ 1 $ . The second test has no question marks, but the given strings are comparable, so the answer is $ 0 $ .