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    This helped me to find a small bug in my code, thank you! :)

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    RRDRRRRRURRRRDRDRDLDRU

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    My code is passing 109 test of 110.
    Array of a failing test is:

    [ '1111000000000000000',
    '1B11111001111111100',
    '1111111111110001110',
    '0000111111000001100',
    '0000111111000001111',
    '00000110000000001X1',
    '0000011000000111111',
    '0000011000001111110',
    '0001111000111110000',
    '0001111100111100000',
    '0000111111111000000',
    '0000011111111100000',
    '0000000000011100000' ]

    answer: RRDRDDDDDRDRRRUURRURRRU

    Reason of a failing is that my answer is too long, it is 23 and correct should be 22.
    I starting to belive that there is something wrong with this test because I can't find manually how this route can be under 23. Can some one show me route under 23? Thanks.

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    This kata is too hard for 5kyu, should be 3kyu.

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    I like this kata. Took a while to complete it. Specially joins gave me a headache.

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    There is no way to continue in this situation. This is one of the random cases.

    MY ANSWER GET STUCK TO (mines 35/38):
    0 0 0 0 0 0 0 0 0 0 0 0 1 ? ? ?
    0 0 0 0 0 0 0 0 0 0 0 1 2 ? ? ?
    0 0 1 1 1 0 0 0 0 0 0 1 x 3 ? ?
    0 0 1 x 1 0 0 0 1 1 1 1 2 3 ? ?
    1 1 1 1 1 1 1 1 1 x 1 0 1 x 2 1
    x 1 0 0 0 1 x 2 2 1 2 2 3 2 1 0
    1 1 0 0 0 1 2 x 1 0 2 x x 2 0 0
    1 1 1 0 0 0 1 1 1 0 2 x x 2 0 0
    1 x 1 1 1 1 0 0 0 0 2 3 3 1 0 0
    1 1 1 1 x 1 1 1 1 0 2 x 2 0 0 0
    0 0 0 1 1 1 1 x 1 0 2 x 2 0 0 0
    0 0 0 0 0 0 1 1 1 0 1 1 1 0 0 0
    0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0
    0 2 x 2 0 1 1 1 0 0 0 0 0 0 0 0
    0 2 x 2 0 1 x 1 0 1 1 2 2 2 1 0
    1 3 3 2 0 1 1 1 0 1 x 2 x x 1 0
    1 x x 1 0 0 0 0 1 3 3 3 2 3 2 1
    1 2 2 1 0 1 1 1 1 x x 1 0 1 x 1
    1 1 0 0 0 1 x 1 1 2 3 2 1 1 1 1
    x 1 1 1 1 1 1 1 1 1 2 x 1 0 0 0
    1 1 1 x 1 0 0 0 1 x 2 1 1 0 0 0
    1 1 1 1 1 0 0 0 1 1 1 0 0 1 1 1
    x 1 0 0 0 0 0 1 1 1 0 0 0 1 x 1
    1 1 0 0 0 0 0 1 x 1 0 0 0 1 1 1

    MAP:
    0 0 0 0 0 0 0 0 0 0 0 0 ? ? ? ?
    0 0 0 0 0 0 0 0 0 0 0 ? ? ? ? ?
    0 0 ? ? ? 0 0 0 0 0 0 ? ? ? ? ?
    0 0 ? ? ? 0 0 0 ? ? ? ? ? ? ? ?
    ? ? ? ? ? ? ? ? ? ? ? 0 ? ? ? ?
    ? ? 0 0 0 ? ? ? ? ? ? ? ? ? ? 0
    ? ? 0 0 0 ? ? ? ? 0 ? ? ? ? 0 0
    ? ? ? 0 0 0 ? ? ? 0 ? ? ? ? 0 0
    ? ? ? ? ? ? 0 0 0 0 ? ? ? ? 0 0
    ? ? ? ? ? ? ? ? ? 0 ? ? ? 0 0 0
    0 0 0 ? ? ? ? ? ? 0 ? ? ? 0 0 0
    0 0 0 0 0 0 ? ? ? 0 ? ? ? 0 0 0
    0 ? ? ? 0 0 0 0 0 0 0 0 0 0 0 0
    0 ? ? ? 0 ? ? ? 0 0 0 0 0 0 0 0
    0 ? ? ? 0 ? ? ? 0 ? ? ? ? ? ? 0
    ? ? ? ? 0 ? ? ? 0 ? ? ? ? ? ? 0
    ? ? ? ? 0 0 0 0 ? ? ? ? ? ? ? ?
    ? ? ? ? 0 ? ? ? ? ? ? ? 0 ? ? ?
    ? ? 0 0 0 ? ? ? ? ? ? ? ? ? ? ?
    ? ? ? ? ? ? ? ? ? ? ? ? ? 0 0 0
    ? ? ? ? ? 0 0 0 ? ? ? ? ? 0 0 0
    ? ? ? ? ? 0 0 0 ? ? ? 0 0 ? ? ?
    ? ? 0 0 0 0 0 ? ? ? 0 0 0 ? ? ?
    ? ? 0 0 0 0 0 ? ? ? 0 0 0 ? ? ?

    RESULT SHOULD BE:
    0 0 0 0 0 0 0 0 0 0 0 0 1 1 2 x
    0 0 0 0 0 0 0 0 0 0 0 1 2 x 2 1
    0 0 1 1 1 0 0 0 0 0 0 1 x 3 2 1
    0 0 1 x 1 0 0 0 1 1 1 1 2 3 x 1
    1 1 1 1 1 1 1 1 1 x 1 0 1 x 2 1
    x 1 0 0 0 1 x 2 2 1 2 2 3 2 1 0
    1 1 0 0 0 1 2 x 1 0 2 x x 2 0 0
    1 1 1 0 0 0 1 1 1 0 2 x x 2 0 0
    1 x 1 1 1 1 0 0 0 0 2 3 3 1 0 0
    1 1 1 1 x 1 1 1 1 0 2 x 2 0 0 0
    0 0 0 1 1 1 1 x 1 0 2 x 2 0 0 0
    0 0 0 0 0 0 1 1 1 0 1 1 1 0 0 0
    0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0
    0 2 x 2 0 1 1 1 0 0 0 0 0 0 0 0
    0 2 x 2 0 1 x 1 0 1 1 2 2 2 1 0
    1 3 3 2 0 1 1 1 0 1 x 2 x x 1 0
    1 x x 1 0 0 0 0 1 3 3 3 2 3 2 1
    1 2 2 1 0 1 1 1 1 x x 1 0 1 x 1
    1 1 0 0 0 1 x 1 1 2 3 2 1 1 1 1
    x 1 1 1 1 1 1 1 1 1 2 x 1 0 0 0
    1 1 1 x 1 0 0 0 1 x 2 1 1 0 0 0
    1 1 1 1 1 0 0 0 1 1 1 0 0 1 1 1
    x 1 0 0 0 0 0 1 1 1 0 0 0 1 x 1
    1 1 0 0 0 0 0 1 x 1 0 0 0 1 1 1