math/factrial.hpp

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• Last update: 2025-01-05 04:43:56+09:00
• Include: #include "math/factrial.hpp"

Code

#ifndef KK2_MATH_FACTORIAL_HPP
#define KK2_MATH_FACTORIAL_HPP 1

namespace kk2 {

template <class S, class T> constexpr S fact(T n) {
    if (n < 0) return 1;
    S res = 1;
    for (T i = 1; i <= n; ++i) res *= i;
    return res;
}

} // namespace kk2

#endif // KK2_MATH_FACTORIAL_HPP

#line 1 "math/factrial.hpp"



namespace kk2 {

template <class S, class T> constexpr S fact(T n) {
    if (n < 0) return 1;
    S res = 1;
    for (T i = 1; i <= n; ++i) res *= i;
    return res;
}

} // namespace kk2

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