#include <iostream> #include <iomanip> using namespace std; int main() { double x, a, b, c, d; cin >> x >> a >> b >> c >> d; // 注意输入顺序变化 double result = a * x * x * x + b * x * x + c * x + d; cout << fixed << setprecision(5) << result << endl; return 0; }