Decoding Jack

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Jack works for the FBI as a decoder. One day, he taps into a network and hears terrorists talking about bombing a hotel which has $10^{10}$ rooms. The terrorists used code language (consisting only of $‘I’$ and $‘D’$) to communicate. The final message that Jack heard was the room number where the terrorists decided to plant the bomb. As Jack didn’t understand the language, he noted down only the f

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solution.cppC++17

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