Method addEdge2

src/class187/Code02_Cobweb1.java:72–78

(int u, int v, int w, int c)

	}

	public static void addEdge2(int u, int v, int w, int c) {
		next2[++cnt2] = head2[u];
		to2[cnt2] = v;
		weight2[cnt2] = w;
		color2[cnt2] = c;
		head2[u] = cnt2;
	}

	public static void rebuild(int u, int fa) {
		int last = 0;