#include #include #include using namespace std; using namespace __gnu_pbds; template using treap = tree, rb_tree_tag, tree_order_statistics_node_update>; #define int long long #define REP(i, n) for (long long i = 0, max_i = (n); i < max_i; i++) #define REPI(i, a, b) for (long long i = (a), max_i = (b); i < max_i; i++) #define ALL(obj) begin(obj), end(obj) #define RALL(obj) rbegin(obj), rend(obj) #define fi first #define se second using ii = pair; vector dirs = { {1, 0}, {0, 1}, {-1, 0}, {0, -1}, // 4方向 {1, 1}, {-1, 1}, {-1, -1}, {1, -1}, // 斜め {0, 0}, // 自身 }; template inline bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } return false; } template inline bool chmin(T& a, const T& b) { if (a > b) { a = b; return true; } return false; } template vector make_vec(size_t n, S x) { return vector(n, x); } template auto make_vec(size_t n, Ts... ts) { return vector(ts...))>(n, make_vec(ts...)); } // debug template ostream& operator<<(ostream& s, vector& d) { REP (i, d.size()) s << d[i] << (i == d.size() - 1 ? "" : " "); return s; } template ostream& operator<<(ostream& s, vector>& d) { REP (i, d.size()) s << d[i] << (i == d.size() - 1 ? "" : "\n"); return s; } template ostream& operator<<(ostream& s, pair& p) { s << "{" << p.first << ", " << p.second << "}"; return s; } template ostream& operator<<(ostream& s, set m) { for (auto it = m.begin(); it != m.end(); it++) { s << *it << (next(it) == m.end() ? "" : "\n"); } return s; } template ostream& operator<<(ostream& s, multiset m) { for (auto it = m.begin(); it != m.end(); it++) { s << *it << (next(it) == m.end() ? "" : "\n"); } return s; } template ostream& operator<<(ostream& s, map m) { for (auto it = m.begin(); it != m.end(); it++) { s << *it << (next(it) == m.end() ? "" : "\n"); } return s; } template ostream& operator<<(ostream& s, unordered_map m) { for (auto it = m.begin(); it != m.end(); it++) { s << *it << (next(it) == m.end() ? "" : "\n"); } return s; } #ifdef _MY_DEBUG #define dump(...) cerr << "/* " << #__VA_ARGS__ << " :[" << __LINE__ << ":" << __FUNCTION__ << "]" << endl, dump_func(__VA_ARGS__), cerr << "*/\n\n"; #else #define dump(...) #define endl "\n" #endif void dump_func() { cerr << endl; } template void dump_func(Head&& h, Tail&&... t) { cerr << h << (sizeof...(Tail) == 0 ? "" : ", "), dump_func(forward(t)...); } struct Fast { Fast() { cin.tie(nullptr); ios::sync_with_stdio(false); } } fast; mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count()); constexpr int MOD = 1000000007; // *************** TEMPLATE END *************** // edgeを貼ったあとにbuild()を忘れない! struct TreeDoubling { struct Edge { int to, len; }; // 場合に応じて書き換える、toは必須 vector> g; int n, size; // MSB + 1 int root; vector depth; vector> parent; // ダミー頂点n(親もn) TreeDoubling(int n) : g(n), n(n), depth(n), size(64 - __builtin_clzll(n)) { parent.resize(size, vector(n + 1, n)); } void dfs(int v, int prev, int d) { depth[v] = d; parent[0][v] = prev; for (auto& s : g[v]) if (s.to != prev) { dfs(s.to, v, d + 1); } } void build(int root_ = 0) { root = root_; dfs(root, n, 0); for (int k = 0; k < size - 1; k++) { for (int i = 0; i < n; i++) { parent[k + 1][i] = parent[k][parent[k][i]]; } } } // vからd個分親にさかのぼった頂点、rootよりも上はnを返す int query(int v, int d) { int ret = v; for (int j = 0; j < size; j++) { if (d >> j & 1) ret = parent[j][ret]; } return ret; } int lca(int u, int v) { if (depth[u] > depth[v]) swap(u, v); v = query(v, depth[v] - depth[u]); if (u == v) return u; for (int j = size - 1; j >= 0; j--) { if (parent[j][u] == parent[j][v]) continue; u = parent[j][u]; v = parent[j][v]; } assert(parent[0][u] == parent[0][v]); return parent[0][u]; } }; signed main() { int n; cin >> n; TreeDoubling td(n); REP (i, n - 1) { int u, v, w; cin >> u >> v >> w; // td.g[u].emplace_back(v, w); td.g[u].push_back({v, w}); td.g[v].push_back({u, w}); } td.build(); vector d(n); function dfs = [&](int v, int prev) { for (auto& p : td.g[v]) if (p.to != prev) { d[p.to] = d[v] + p.len; dfs(p.to, v); } }; dfs(0, -1); vector ls(n), rs(n); function dfs2 = [&](int v, int p, int& idx) { ls[v] = idx++; for (auto& s : td.g[v]) if (s.to != p) { dfs2(s.to, v, idx); } rs[v] = idx; }; int Q; cin >> Q; REP (q, Q) { int K; cin >> K; vector xs(K); REP (i, K) cin >> xs[i]; sort(ALL(xs), [&](int i, int j) { return ls[i] < ls[j]; }); int acc = 0; int ans = 0; REP (i, xs.size()) { acc = td.lca(acc, xs[i]); ans += d[xs[i]]; if (i < (int)xs.size() - 1) { int lca = td.lca(xs[i], xs[i + 1]); ans -= d[lca]; } } ans -= d[acc]; cout << ans << endl; } }