#include <cmath>
#include <iostream>
using namespace std;
template <typename T>
const T PI = std::acos(static_cast<T>(-1));
template <typename T>
const T ONE_EIGHTY = 180;
template <typename T>
const T DEG_TO_RAD = PI<T> / ONE_EIGHTY<T>;
int main() {
cout << DEG_TO_RAD<float> << endl;
}
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