Number Of Ways

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John wanted to buy gifts for some k children in his apartments on christmas. He goes to the shop and the shopkeeper shows him n gifts. How many ways John can choose k gifts from n total gifts ?. Since answer could be large print the answer mod 1000000007 NOTE : ordering of the gifts do not matter Different order of same set of gifts are considered same and should not be counted as different Inpu

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solution.cppC++17

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