Method delNum

src/class194/Code08_Tourists1.java:81–88

(int u, int num)

	}

	public static void delNum(int u, int num) {
		int cnt = maps.get(u).get(num);
		if (cnt == 1) {
			maps.get(u).remove(num);
		} else {
			maps.get(u).put(num, cnt - 1);
		}
	}

	public static int getMin(int u) {
		return maps.get(u).firstKey();