題目：

程式碼：

#include <iostream>
using namespace std;

int f(int t)
{
	if (t <= 3500)return t;
	int s = 3500;
	t -= 3500;
	if (t <= 1455)return s + t * 100 / 97;
 

	s += 1500, t -= 1455;
	if (t <= 2700)return s + t * 100 / 90;
	s += 3000, t -= 2700;
	if (t <= 3600)return s + t * 100 / 80;
	s += 4500, t -= 3600;
	if (t <= 19500)return s + t * 100 / 75;
	s += 26000, t -= 19500;
	if (t <= 14000)return s + t * 100 / 70;
	s += 20000, t -= 14000;
	if (t <= 16250)return s + t * 100 / 65;
	s += 25000, t -=
 
 16250;
	return s + t * 100 / 55;
}

int main()
{
	int t;
	cin >> t;
	cout << f(t);
	return 0;
}