Plus Equation

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You are given a string $S$ containing only decimal digits ('0' through '9') and a number $N$. Your task is to insert an arbitrary number (including zero) of plus signs '+' into $S$ in order to form a valid expression whose value is equal to $N$. ### Input - The first line of the input contains a single integer $T$ denoting the number of test cases. The description of $T$ test cases follows. - The

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solution.cppC++17

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