Binomial Coefficients

CSESMathematicsOpen on judge ↗

Your task is to calculate n binomial coefficients modulo 10^9+7. A binomial coefficient {a \choose b} can be calculated using the formula \frac{a!}{b!(a-b)!}. We assume that a and b are integers and 0 \le b \le a. Input The first input line contains an integer n: the number of calculations. After this, there are n lines, each of which contains two integers a and b. Output Print each binomial

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solution.cppC++17

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