la casa de papel

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After entering $Royal$ $Mint,$ $Berlin$ is now done with printing money, now he has to come out of building without getting caught. Assume building is a **( M X M )** grid, each labelled with a letter in alphabets. e.g: CDEF DZKZ EFZD YEDC $Berlin$ walks from upper-left corner to lower-right corner, in each step he can either go one character right or one character down.

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solution.cppC++17

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