Obsession

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Ayush ($ayu111$) loves "1" too much and is obsessed with it.Now his friend, Shyamu introduced him a new digit "0". So he starts using it too. He creates numbers only with these two digits and creates a list with infinite numbers. Note that the list starts with 1, because he still loves "1" more. He asks you to guess the $N$th number in the list, if it is sorted in ascending order. ###Inpu

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solution.cppC++17

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