Method on

src/class185/Code07_HideSeek1.java:320–333

(int x)

	}

	public static void on(int x) {
		delAns(x);
		sonMax[x].del(0);
		addAns(x);
		for (int u = x, fa = centfa[u]; fa > 0; u = fa, fa = centfa[u]) {
			delAns(fa);
			sonMax[fa].del(distFa[u].first());
			distFa[u].del(getDist(x, fa));
			if (distFa[u].size() > 0) {
				sonMax[fa].add(distFa[u].first());
			}
			addAns(fa);
		}
	}

	public static void off(int x) {
		delAns(x);