有種今年APCS的味道
#include <iostream>
using namespace std;
int main()
{
int h, x, y;
cin >> h >> x >> y;
int now = 0, count = 0;
for (int i = 0; i < 999; i++)
{
if (now + x >= h)
{
cout << count + 1;
break;
}
else
{
now += (x - y);
count += 1;
}
}
}