Santa gives gifts

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Its Christmas time and Santa has started his ride to deliver gifts to children waiting for him in a 1-dimentional city. All houses in this city are on a number line numbered as 1, 2, 3... and so on. Santa wants to deliver to houses from n to m, but he found that all the kids living at positions that are divisible by a, a+d, a+2d, a+3d or a+4d are naughty and he does not want to deliver them any gi

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solution.cppC++17

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