Method addEdge

src/class191/Code06_Network1.java:52–56

(int u, int v)

	}

	public static void addEdge(int u, int v) {
		nxt[++cntg] = head[u];
		to[cntg] = v;
		head[u] = cntg;
	}

	public static void tarjan(int u, int preEdge) {
		dfn[u] = low[u] = ++cntd;