CARDS

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Rishabh loves to play with cards and puzzles, Today he is trying something new with cards and poses a question for you. Can you solve it? Rishabh has $N$ cards. On the $i$-$th$ $(1≤i≤N)$ card is written an integer $xi$. He is selecting one or more cards from these $N$ cards, so that the average of the integers written on the selected cards is exactly $A$. In how many ways can he make his selectio

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solution.cppC++17

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