9 lines
244 B
C++
9 lines
244 B
C++
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#include <boost/iterator/counting_iterator.hpp>
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#include <algorithm>
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int factorial(int n)
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{
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// last is one-past-end
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return std::accumulate(boost::counting_iterator<int>(1), boost::counting_iterator<int>(n+1), 1, std::multiplies<int>());
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}
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