結果
問題 | No.399 動的な領主 |
ユーザー | Min_25 |
提出日時 | 2016-07-21 01:58:11 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 223 ms / 2,000 ms |
コード長 | 5,194 bytes |
コンパイル時間 | 2,187 ms |
コンパイル使用メモリ | 118,592 KB |
実行使用メモリ | 19,908 KB |
最終ジャッジ日時 | 2024-11-14 19:47:03 |
合計ジャッジ時間 | 5,730 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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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 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 2 ms
6,816 KB |
testcase_04 | AC | 3 ms
6,816 KB |
testcase_05 | AC | 15 ms
6,820 KB |
testcase_06 | AC | 223 ms
15,232 KB |
testcase_07 | AC | 222 ms
15,360 KB |
testcase_08 | AC | 210 ms
15,360 KB |
testcase_09 | AC | 207 ms
15,228 KB |
testcase_10 | AC | 3 ms
6,816 KB |
testcase_11 | AC | 10 ms
6,816 KB |
testcase_12 | AC | 117 ms
15,996 KB |
testcase_13 | AC | 113 ms
16,000 KB |
testcase_14 | AC | 77 ms
19,908 KB |
testcase_15 | AC | 91 ms
19,852 KB |
testcase_16 | AC | 90 ms
17,664 KB |
testcase_17 | AC | 208 ms
15,360 KB |
testcase_18 | AC | 206 ms
15,232 KB |
ソースコード
#pragma GCC optimize ("O3") #pragma GCC target ("avx") // #pragma GCC target ("sse4") // SPOJ, codechef #include <cstdio> #include <cassert> #include <cmath> #include <cstring> #include <iostream> #include <algorithm> #include <vector> #include <map> #include <set> #include <queue> #include <functional> #include <tuple> #define _rep(_1, _2, _3, _4, name, ...) name #define rep2(i, n) rep3(i, 0, n) #define rep3(i, a, b) rep4(i, a, b, 1) #define rep4(i, a, b, c) for (int i = int(a); i < int(b); i += int(c)) #define rep(...) _rep(__VA_ARGS__, rep4, rep3, rep2, _)(__VA_ARGS__) using namespace std; using i64 = long long; using u8 = unsigned char; using u32 = unsigned; using u64 = unsigned long long; using f80 = long double; using Edges = vector< vector<int> >; // ref. pekempey さん struct HLD { struct node { int id, par, head; }; HLD(const Edges& edges) : N(edges.size()), edges(edges), tree(N), heavy(N) { dfs(); path(); } int dfs(int v=0, int p=-1) { int cnt = 1, x = 0, h = -1; for (auto w : edges[v]) if (w != p) { tree[w].par = v; int c = dfs(w, v); if (c > x) x = c, h = w; cnt += c; } heavy[v] = h; return cnt; } void path() { int id = 0; tree[id].par = -1; queue<int> que; que.push(id); while (!que.empty()) { int len = 0, v = que.front(); que.pop(); for (int w = v; w >= 0; w = heavy[w], ++len) { tree[w].id = id++; tree[w].head = v; for (auto x : edges[w]) if (x != heavy[w] && x != tree[w].par) que.push(x); } tree[v].head = -len; } } int head(int v) const { return tree[v].head < 0 ? v : tree[v].head; } template <typename func_t> void update(int v, int w, func_t func) { while (1) { if (tree[v].id < tree[w].id) swap(v, w); int hv = head(v), ofs = tree[hv].id, size = -tree[hv].head; if (hv != head(w)) { func(0, tree[v].id - ofs + 1, ofs, size); v = tree[hv].par; continue; } func(tree[w].id - ofs, tree[v].id - ofs + 1, ofs, size); break; } } int N; const Edges& edges; vector<node> tree; vector<int> heavy; }; Edges edges; struct SegmentTree { struct node { using result_t = i64; node() : sum(0), lazy(0) {} node(i64 s, int l) : sum(s), lazy(l) {} result_t result() const { return sum; } static node merge(const node& lhs, const node& rhs, int b) { i64 sum = (lhs.sum + rhs.sum) + i64(b) * (lhs.lazy + rhs.lazy); return node(sum, 0); } i64 sum; int lazy; }; SegmentTree(int N) : buff_size(N) { buff = new node[2 * N]; } ~SegmentTree() { delete [] buff; } void propagate(int k) { int ks[30], ki = 0, b = 1; for (k >>= 1; k >= 1; k >>= 1, b <<= 1) ks[ki++] = k; for (; ki; b >>= 1) { int k = ks[--ki]; int l = tree[k].lazy; if (l) { tree[2 * k + 0].lazy += l; tree[2 * k + 1].lazy += l; tree[k].sum += i64(l) * b; tree[k].lazy = 0; } } } void fix(int k, int b) { tree[k] = node::merge(tree[2 * k + 0], tree[2 * k + 1], b >> 1); } void update(int l, int r, int offset=0, int N=0) { size = (N ? N : buff_size); tree = buff + offset * 2; l += size; r += size; propagate(l); propagate(r - 1); int b = 1; bool lup = false, rup = false; for (; l < r; l >>= 1, r >>= 1, b <<= 1) { if (lup) fix(l - 1, b); if (rup) fix(r, b); if (l & 1) tree[l++].lazy += 1, lup = true; if (r & 1) tree[--r].lazy += 1, rup = true; } for (--l; l < r; l >>= 1, r >>= 1, b <<= 1) { if (lup) fix(l, b); if (rup) fix(r, b); } for (; l; l >>= 1, b <<= 1) fix(l, b); } node::result_t query(int l, int r, int offset=0, int N=0) { size = (N ? N : buff_size); tree = buff + offset * 2; l += size; r += size; propagate(l); propagate(r - 1); node left, right; int b = 1; for (; l < r; l >>= 1, r >>= 1, b <<= 1) { if (l & 1) left = node::merge(left, tree[l++], b); if (r & 1) right = node::merge(tree[--r], right, b); } left = node::merge(left, right, b); return left.result(); } int buff_size; node* buff; int size; node* tree; }; void solve() { int N; while (~scanf("%d", &N)) { edges.clear(); edges.resize(N); rep(i, N) edges[i].reserve(8); rep(i, N - 1) { int v, w; scanf("%d %d", &v, &w); --v; --w; edges[v].push_back(w); edges[w].push_back(v); } auto hld = HLD(edges); auto tree = SegmentTree(N); int Q; scanf("%d", &Q); rep(i, Q) { int v, w; scanf("%d %d", &v, &w); --v, --w; hld.update(v, w, [&](int l, int r, int o, int s) { tree.update(l, r, o, s); }); } auto tri = [](int n) { return i64(n) * (n + 1) / 2; }; i64 ans = 0; rep(i, N) if (hld.tree[i].head < 0) { int o = hld.tree[i].id; int l = -hld.tree[i].head; rep(j, l) ans += tri(tree.query(j, j + 1, o, l)); } printf("%lld\n", ans); } } int main() { clock_t beg = clock(); solve(); clock_t end = clock(); fprintf(stderr, "%.3f sec\n", double(end - beg) / CLOCKS_PER_SEC); return 0; }