結果
問題 | No.235 めぐるはめぐる (5) |
ユーザー | pekempey |
提出日時 | 2015-08-27 18:01:19 |
言語 | C++11 (gcc 11.4.0) |
結果 |
AC
|
実行時間 | 2,044 ms / 10,000 ms |
コード長 | 6,057 bytes |
コンパイル時間 | 2,049 ms |
コンパイル使用メモリ | 188,380 KB |
実行使用メモリ | 103,040 KB |
最終ジャッジ日時 | 2024-07-18 15:00:19 |
合計ジャッジ時間 | 10,456 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2,044 ms
81,792 KB |
testcase_01 | AC | 1,705 ms
103,040 KB |
testcase_02 | AC | 1,987 ms
87,040 KB |
ソースコード
#include <bits/stdc++.h> #define rep(i, a) rep2 (i, 0, a) #define rep2(i, a, b) for (int i = (a); i < (b); i++) #define repr(i, a) repr2 (i, 0, a) #define repr2(i, a, b) for (int i = (b) - 1; i >= (a); i--) using namespace std; typedef long long ll; const int inf = 1e9; const pair<int, int> infp(inf, inf); const ll mod = 1e9 + 7; ll modulo(ll x) { x %= mod; x += mod; x %= mod; return x; } template<class T> struct RMQ { vector<T> seg; int size; T inf; RMQ() {} RMQ(int n, T inf) { init(n, inf); } void init(int n, T inf) { this->inf = inf; size = 1; while (size < n) size *= 2; seg.resize(size * 2 - 1, inf); } void update(int k, T x) { k += size - 1; seg[k] = x; while (k > 0) { k = (k - 1) / 2; seg[k] = min(seg[k * 2 + 1], seg[k * 2 + 2]); } } T query(int a, int b, int k, int l, int r) { if (r <= a || b <= l) return inf; if (a <= l && r <= b) return seg[k]; T vl = query(a, b, k * 2 + 1, l, (l + r) / 2); T vr = query(a, b, k * 2 + 2, (l + r) / 2, r); return min(vl, vr); } T query(int a, int b) { return query(a, b, 0, 0, size); } }; struct LCA { RMQ<pair<int, int>> rmq; vector<pair<int, int> > euler; vector<vector<int> > G; vector<int> id; LCA(int V) : rmq(V * 2 - 1, make_pair(inf, inf)), G(V), id(V), euler(V * 2 - 1) {} void add(int u, int v) { G[u].push_back(v); G[v].push_back(u); } void dfs(int curr, int prev, int depth, int &k) { id[curr] = k; euler[k++] = make_pair(depth, curr); for (int next : G[curr]) if (next != prev) { dfs(next, curr, depth + 1, k); euler[k++] = make_pair(depth, curr); } } void build() { int k = 0; dfs(0, -1, 0, k); rep (i, euler.size()) { rmq.update(i, euler[i]); } } int query(int u, int v) { return rmq.query(min(id[u], id[v]), max(id[u], id[v]) + 1).second; } }; struct SegmentTree { vector<ll> sum, lazy; vector<ll> weight, wsum; int size; void init(int n) { size = 1; while (size < n) size *= 2; sum.resize(size * 2 - 1); lazy.resize(size * 2 - 1); weight.resize(size); wsum.resize(size + 1); } void setWeight(int k, int w) { weight[k] = w; } void buildWeight() { partial_sum(weight.begin(), weight.end(), wsum.begin() + 1); rep (i, wsum.size()) { wsum[i] %= mod; } } void setInit(int k, ll x) { k += size - 1; sum[k] = x; } void build() { repr (k, size - 1) { sum[k] = sum[k * 2 + 1] + sum[k * 2 + 2]; sum[k] %= mod; } } void evallazy(int k, int l, int r) { sum[k] += lazy[k] * (wsum[r] - wsum[l]); sum[k] = modulo(sum[k]); if (r - l > 1) { lazy[k * 2 + 1] += lazy[k]; lazy[k * 2 + 2] += lazy[k]; lazy[k * 2 + 1] %= mod; lazy[k * 2 + 2] %= mod; } lazy[k] = 0; } void update(int a, int b, ll x, int k, int l, int r) { evallazy(k, l, r); if (r <= a || b <= l) return; if (a <= l && r <= b) { lazy[k] += x; lazy[k] %= mod; evallazy(k, l, r); } else { update(a, b, x, k * 2 + 1, l, (l + r) / 2); update(a, b, x, k * 2 + 2, (l + r) / 2, r); sum[k] = sum[k * 2 + 1] + sum[k * 2 + 2]; sum[k] %= mod; } } void update(int a, int b, ll x) { update(a, b, x, 0, 0, size); } ll query(int a, int b, int k, int l, int r) { evallazy(k, l, r); if (r <= a || b <= l) return 0; if (a <= l && r <= b) return sum[k]; ll res = 0; res += query(a, b, k * 2 + 1, l, (l + r) / 2); res += query(a, b, k * 2 + 2, (l + r) / 2, r); return res % mod; } ll query(int a, int b) { return query(a, b, 0, 0, size); } }; int V; vector<int> G[202020]; vector<int> color[202020]; // (0:light), (1:heavy) int parent[202020]; int root[202020]; int order[202020]; int size[202020]; map<int, SegmentTree> seg; ll S[202020], C[202020]; int dfs(int curr, int prev) { int res = 1; rep (i, G[curr].size()) { int next = G[curr][i]; if (next == prev) continue; parent[next] = curr; int d = dfs(next, curr); res += d; color[curr][i] = d; } int maxi = max_element(color[curr].begin(), color[curr].end()) - color[curr].begin(); rep (i, G[curr].size()) { color[curr][i] = maxi == i; } return res; } void dfs2(int curr, int prev) { rep (i, G[curr].size()) { int next = G[curr][i]; if (next == prev) continue; if (color[curr][i]) { root[next] = root[curr]; order[next] = order[curr] + 1; } dfs2(next, curr); } } void build() { memset(parent, -1, sizeof(parent)); rep (i, V) color[i].resize(G[i].size()); dfs(0, -1); rep (i, V) root[i] = i; dfs2(0, -1); rep (i, V) { size[root[i]]++; } rep (i, V) { if (i == root[i]) { seg[i].init(size[i]); } } } void update(LCA &lca, int u, int v, ll x) { int l = lca.query(u, v); while (root[l] != root[u]) { seg[root[u]].update(0, order[u] + 1, x); u = parent[root[u]]; } while (root[l] != root[v]) { seg[root[v]].update(0, order[v] + 1, x); v = parent[root[v]]; } int a = min(order[u], order[v]); int b = max(order[u], order[v]); seg[root[u]].update(a, b + 1, x); } int query(LCA &lca, int u, int v) { int l = lca.query(u, v); ll res = 0; while (root[l] != root[u]) { res += seg[root[u]].query(0, order[u] + 1); res %= mod; u = parent[root[u]]; } while (root[l] != root[v]) { res += seg[root[v]].query(0, order[v] + 1); res %= mod; v = parent[root[v]]; } int a = min(order[u], order[v]); int b = max(order[u], order[v]); res += seg[root[u]].query(a, b + 1); res %= mod; return res; } int main() { cin >> V; rep (i, V) cin >> S[i]; rep (i, V) cin >> C[i]; LCA lca(V); rep (i, V - 1) { int u, v; cin >> u >> v; u--; v--; G[u].push_back(v); G[v].push_back(u); lca.add(u, v); } lca.build(); build(); rep (i, V) { seg[root[i]].setWeight(order[i], C[i]); seg[root[i]].setInit(order[i], S[i]); } rep (i, V) { if (i == root[i]) { seg[i].buildWeight(); seg[i].build(); } } int Q; cin >> Q; while (Q--) { int a; cin >> a; if (a == 0) { int x, y, z; cin >> x >> y >> z; x--; y--; update(lca, x, y, z); } else { int x, y; cin >> x >> y; x--; y--; ll ans = query(lca, x, y); cout << ans << endl; } } return 0; }