Binary Dish

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Chef is preparing a _Binary Dish_ for her girlfriend on Valentine's day. A _Binary Dish_ is one which is made up of exactly $2$ ingredients, $A$ and $B$. A dish is made by performing $N$ number of steps. At $i^{th}$ step, we can add either: $\quad$ $1$ unit of $A$ $\quad$ $\quad$ $\quad$ or $\quad$ $1$ unit of $B$ if $1$ unit of $A$ is added in ${(i-1)}^{th}$ step. In the

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solution.cppC++17

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