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#pragma once
#include <cmath>
namespace wolff {
template <class T>
struct height_t {
T x;
height_t() : x(0) {}
height_t(T x) : x(x) {}
typedef T M_t;
typedef double F_t;
inline T operator*(unsigned a) const {
return x * a;
}
inline double operator*(double a) const {
return x * a;
}
inline T operator-(const height_t& h) const {
return x - h.x;
}
};
template <class T>
inline typename height_t<T>::M_t operator*(unsigned a, height_t<T> h) {
return h * a;
}
template <class T>
inline typename height_t<T>::F_t operator*(double a, height_t<T> h) {
return h * a;
}
template <class T>
inline T& operator+=(T& M, const height_t<T> &h) {
M += h.x;
return M;
}
template <class T>
inline T& operator-=(T& M, const height_t<T> &h) {
M -= h.x;
return M;
}
}
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