#include<iostream> #include<iomanip> using namespace std; int main() { int x = 0; cin >> x; if (x <= 2) { cout << 6; if (x > 2 && x <= 10) { cout << (x - 2)1.8 + 6; if (x > 10) { cout << 6 + * 1.8 + (x - 10) * 2.7 } } } }