public String isAble(long D, int T, int B) {
		long remain = D-T;
		if (remain == 0) {
			return "Possible";
		}
		if (remain < 0) {
			return "Impossible";
		}
		int diff = B - 1;
		if (remain % diff == 0 && remain / diff <= T) {
			return "Possible";
		}
		return "Impossible";

	}