#include <iostream.h>

void main()
{
	int n, u, d;
	cin >> n >> u >> d;
	while (n != 0) {
		int count = 1;
		n -= u;
		while ( n > 0) {
			n += (d-u);
			count+=2;
		}
		cout << count << endl;
		cin >> n >> u >> d;
	}
}