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    Thank you. I misunderstood the condition.

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    So strange. I actually just submitted my solution a few times out of frustration and it suddenly passed. I guess the random error generator generated just the right conditions. :) But I was able to look at some of the other solutions and see that I was pretty close. I just need to learn to optimize my code.

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    return true if the walk the app gives you will take you exactly ten minutes

    Nothing is hidden, that doesn't take ten minutes, only two.

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    It appears you solved it already. But to verify, you don't need to take the same path back.

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    My solution passed 93 tests and failed 11. I think what I've not accounted for is the path back. Do you have to take the same exact path you took or does the quickest path back work. My code assumes a perfect grid and time to get cak is calculated based on the quickest way back and not the way you came.