| 119 | } |
| 120 | |
| 121 | public static void dfs3(int cur, int father, int distance) { |
| 122 | stacksize = 0; |
| 123 | push(cur, father, distance, 0, -1); |
| 124 | while (stacksize > 0) { |
| 125 | pop(); |
| 126 | if (e == -1) { |
| 127 | fa[u] = f; |
| 128 | dep[u] = dep[f] + 1; |
| 129 | dist[u] = a; |
| 130 | siz[u] = 1; |
| 131 | e = head[u]; |
| 132 | } else { |
| 133 | e = nxt[e]; |
| 134 | } |
| 135 | if (e != 0) { |
| 136 | push(u, f, a, 0, e); |
| 137 | int v = to[e]; |
| 138 | int w = weight[e]; |
| 139 | if (v != f) { |
| 140 | push(v, u, a + w, 0, -1); |
| 141 | } |
| 142 | } else { |
| 143 | for (int ei = head[u]; ei > 0; ei = nxt[ei]) { |
| 144 | int v = to[ei]; |
| 145 | if (v != f) { |
| 146 | siz[u] += siz[v]; |
| 147 | if (son[u] == 0 || siz[son[u]] < siz[v]) { |
| 148 | son[u] = v; |
| 149 | } |
| 150 | } |
| 151 | } |
| 152 | } |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | public static void dfs4(int cur, int tag) { |
| 157 | stacksize = 0; |