#include #include #include #include #include using namespace std; const int mod = 1e9 + 7; struct Modint { int n; Modint(int n = 0) : n(n) {} }; Modint operator+(Modint a, Modint b) { return Modint((a.n += b.n) >= mod ? a.n - mod : a.n); } Modint operator-(Modint a, Modint b) { return Modint((a.n -= b.n) < 0 ? a.n + mod : a.n); } Modint operator*(Modint a, Modint b) { return Modint(1LL * a.n * b.n % mod); } Modint &operator+=(Modint &a, Modint b) { return a = a + b; } Modint &operator-=(Modint &a, Modint b) { return a = a - b; } Modint &operator*=(Modint &a, Modint b) { return a = a * b; } using V = array; using M = array; M one = { V { 1, 0 }, V { 0, 1 } }; M operator *(M a, M b) { M res = {}; for (int i = 0; i < 2; i++) { for (int k = 0; k < 2; k++) { for (int j = 0; j < 2; j++) { res[i][j] += a[i][k] * b[k][j]; } } } return res; } struct HLD { using Tree = std::vector>; std::vector parent, head, vid, len, inv; HLD(const Tree &g) : parent(g.size()), head(g.size()), vid(g.size()), len(g.size()), inv(g.size()) { int k = 0; std::vector size(g.size(), 1); std::function dfs = [&](int u, int p) { for (int v : g[u]) if (v != p) dfs(v, u), size[u] += size[v]; }; std::function dfs2 = [&](int u, int p, int h) { parent[u] = p; head[u] = h; vid[u] = k++; inv[vid[u]] = u; for (int v : g[u]) if (v != p && size[u] < size[v] * 2) dfs2(v, u, h); for (int v : g[u]) if (v != p && size[u] >= size[v] * 2) dfs2(v, u, v); }; dfs(0, -1); dfs2(0, -1, 0); for (int i = 0; i < g.size(); i++) { len[head[i]]++; } } int rev(int u) { int h = head[inv[u]]; int offset = u - vid[h]; return vid[h] + len[h] - 1 - offset; } template void foreach(int u, int v, T f) { while (true) { if (vid[u] > vid[v]) { if (head[u] == head[v]) { f(vid[v] + 1, vid[u], 0); break; } else { f(vid[head[u]], vid[u], 1); u = parent[head[u]]; } } else { if (head[u] == head[v]) { f(vid[u] + 1, vid[v], 0); break; } else { f(vid[head[v]], vid[v], 0); v = parent[head[v]]; } } } }; }; const int N = 1 << 17; struct Seg { vector dat; Seg() : dat(N * 2, one) {} void update(int k, M m) { dat[k + N] = m; for (int i = k + N >> 1; i > 0; i >>= 1) { dat[i] = dat[i * 2] * dat[i * 2 + 1]; } } M query(int l, int r) { M resL = one; M resR = one; r++; l += N; r += N; while (l < r) { if (l & 1) resL = resL * dat[l++]; if (r & 1) resR = dat[--r] * resR; l >>= 1; r >>= 1; } return resL * resR; } }; int input() { int n; scanf("%d", &n); return n; } int main() { int n = input(); vector> g(n); vector us(n - 1); vector vs(n - 1); for (int i = 0; i < n - 1; i++) { int u = input(); int v = input(); us[i] = u; vs[i] = v; g[u].push_back(v); g[v].push_back(u); } HLD hld(g); Seg seg0; int q = input(); while (q--) { char c; scanf(" %c", &c); if (c == 'g') { int u = input(); int v = input(); M resR = one; hld.foreach(u, v, [&](int l, int r, int d) { if (d == 0) { resR = seg0.query(l, r) * resR; } }); printf("%d %d %d %d\n", resR[0][0].n, resR[0][1].n, resR[1][0].n, resR[1][1].n); } else { int u = input(); M m; for (int i = 0; i < 2; i++) { for (int j = 0; j < 2; j++) { m[i][j] = input(); } } int x = hld.vid[us[u]] < hld.vid[vs[u]] ? vs[u] : us[u]; seg0.update(hld.vid[x], m); } } }