結果
| 問題 | No.1790 Subtree Deletion |
| ユーザー |
👑  hos.lyric
|
| 提出日時 | 2021-12-19 00:09:12 |
| 言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
| 結果 |
AC
|
| 実行時間 | 124 ms / 3,000 ms |
| コード長 | 7,516 bytes |
| コンパイル時間 | 1,427 ms |
| コンパイル使用メモリ | 113,664 KB |
| 実行使用メモリ | 16,428 KB |
| 最終ジャッジ日時 | 2024-09-15 14:19:06 |
| 合計ジャッジ時間 | 3,834 ms |
|
ジャッジサーバーID （参考情報） |
judge2 / judge3 |
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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
5,248 KB |
| testcase_01 | AC | 2 ms
5,376 KB |
| testcase_02 | AC | 2 ms
5,376 KB |
| testcase_03 | AC | 120 ms
16,296 KB |
| testcase_04 | AC | 120 ms
16,428 KB |
| testcase_05 | AC | 124 ms
16,300 KB |
| testcase_06 | AC | 123 ms
16,292 KB |
| testcase_07 | AC | 124 ms
16,292 KB |
| testcase_08 | AC | 22 ms
5,376 KB |
| testcase_09 | AC | 118 ms
16,288 KB |
| testcase_10 | AC | 123 ms
16,292 KB |
| testcase_11 | AC | 118 ms
16,288 KB |
| testcase_12 | AC | 83 ms
15,672 KB |
| testcase_13 | AC | 87 ms
14,604 KB |
| testcase_14 | AC | 34 ms
6,400 KB |
ソースコード
#include <cassert>
#include <cmath>
#include <cstdint>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <algorithm>
#include <bitset>
#include <complex>
#include <deque>
#include <functional>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
using Int = long long;
template <class T1, class T2> ostream &operator<<(ostream &os, const pair<T1, T2> &a) { return os << "(" << a.first << ", " << a.second << ")"; };
template <class T> void pv(T a, T b) { for (T i = a; i != b; ++i) cerr << *i << " "; cerr << endl; }
template <class T> bool chmin(T &t, const T &f) { if (t > f) { t = f; return true; } return false; }
template <class T> bool chmax(T &t, const T &f) { if (t < f) { t = f; return true; } return false; }
// T: monoid representing information of an interval.
// T() should return the identity.
// T(S s) should represent a single element of the array.
// T::push(T &l, T &r) should push the lazy update.
// T::merge(const T &l, const T &r) should merge two intervals.
template <class T> struct SegmentTreeRange {
int logN, n;
vector<T> ts;
SegmentTreeRange() {}
explicit SegmentTreeRange(int n_) {
for (logN = 0, n = 1; n < n_; ++logN, n <<= 1) {}
ts.resize(n << 1);
}
template <class S> explicit SegmentTreeRange(const vector<S> &ss) {
const int n_ = ss.size();
for (logN = 0, n = 1; n < n_; ++logN, n <<= 1) {}
ts.resize(n << 1);
for (int i = 0; i < n_; ++i) at(i) = T(ss[i]);
build();
}
T &at(int i) {
return ts[n + i];
}
void build() {
for (int u = n; --u; ) merge(u);
}
inline void push(int u) {
ts[u].push(ts[u << 1], ts[u << 1 | 1]);
}
inline void merge(int u) {
ts[u].merge(ts[u << 1], ts[u << 1 | 1]);
}
// Applies T::f(args...) to [a, b).
template <class F, class... Args>
void ch(int a, int b, F f, Args &&... args) {
assert(0 <= a); assert(a <= b); assert(b <= n);
if (a == b) return;
a += n; b += n;
for (int h = logN; h; --h) {
const int aa = a >> h, bb = b >> h;
if (aa == bb) {
if ((aa << h) != a || (bb << h) != b) push(aa);
} else {
if ((aa << h) != a) push(aa);
if ((bb << h) != b) push(bb);
}
}
for (int aa = a, bb = b; aa < bb; aa >>= 1, bb >>= 1) {
if (aa & 1) (ts[aa++].*f)(args...);
if (bb & 1) (ts[--bb].*f)(args...);
}
for (int h = 1; h <= logN; ++h) {
const int aa = a >> h, bb = b >> h;
if (aa == bb) {
if ((aa << h) != a || (bb << h) != b) merge(aa);
} else {
if ((aa << h) != a) merge(aa);
if ((bb << h) != b) merge(bb);
}
}
}
// Calculates the product for [a, b).
T get(int a, int b) {
assert(0 <= a); assert(a <= b); assert(b <= n);
if (a == b) return T();
a += n; b += n;
for (int h = logN; h; --h) {
const int aa = a >> h, bb = b >> h;
if (aa == bb) {
if ((aa << h) != a || (bb << h) != b) push(aa);
} else {
if ((aa << h) != a) push(aa);
if ((bb << h) != b) push(bb);
}
}
T prodL, prodR, t;
for (int aa = a, bb = b; aa < bb; aa >>= 1, bb >>= 1) {
if (aa & 1) { t.merge(prodL, ts[aa++]); prodL = t; }
if (bb & 1) { t.merge(ts[--bb], prodR); prodR = t; }
}
t.merge(prodL, prodR);
return t;
}
// Calculates T::f(args...) of a monoid type for [a, b).
// op(-, -) should calculate the product.
// e() should return the identity.
template <class Op, class E, class F, class... Args>
#if __cplusplus >= 201402L
auto
#else
decltype((std::declval<T>().*F())())
#endif
get(int a, int b, Op op, E e, F f, Args &&... args) {
assert(0 <= a); assert(a <= b); assert(b <= n);
if (a == b) return e();
a += n; b += n;
for (int h = logN; h; --h) {
const int aa = a >> h, bb = b >> h;
if (aa == bb) {
if ((aa << h) != a || (bb << h) != b) push(aa);
} else {
if ((aa << h) != a) push(aa);
if ((bb << h) != b) push(bb);
}
}
auto prodL = e(), prodR = e();
for (int aa = a, bb = b; aa < bb; aa >>= 1, bb >>= 1) {
if (aa & 1) prodL = op(prodL, (ts[aa++].*f)(args...));
if (bb & 1) prodR = op((ts[--bb].*f)(args...), prodR);
}
return op(prodL, prodR);
}
// Find min b s.t. T::f(args...) returns true,
// when called for the partition of [a, b) from left to right.
// Returns n + 1 if there is no such b.
template <class F, class... Args>
int findRight(int a, F f, Args &&... args) {
assert(0 <= a); assert(a <= n);
if ((T().*f)(args...)) return a;
if (a == n) return n + 1;
a += n;
for (int h = logN; h; --h) push(a >> h);
for (; ; a >>= 1) if (a & 1) {
if ((ts[a].*f)(args...)) {
for (; a < n; ) {
push(a);
if (!(ts[a <<= 1].*f)(args...)) ++a;
}
return a - n + 1;
}
++a;
if (!(a & (a - 1))) return n + 1;
}
}
// Find max a s.t. T::f(args...) returns true,
// when called for the partition of [a, b) from right to left.
// Returns -1 if there is no such a.
template <class F, class... Args>
int findLeft(int b, F f, Args &&... args) {
assert(0 <= b); assert(b <= n);
if ((T().*f)(args...)) return b;
if (b == 0) return -1;
b += n;
for (int h = logN; h; --h) push((b - 1) >> h);
for (; ; b >>= 1) if ((b & 1) || b == 2) {
if ((ts[b - 1].*f)(args...)) {
for (; b <= n; ) {
push(b - 1);
if (!(ts[(b <<= 1) - 1].*f)(args...)) --b;
}
return b - n - 1;
}
--b;
if (!(b & (b - 1))) return -1;
}
}
};
////////////////////////////////////////////////////////////////////////////////
struct Node {
Int sum;
bool lz;
Node() : sum(0), lz(false) {}
Node(Int val) : sum(val), lz(false) {}
void push(Node &l, Node &r) {
if (lz) {
l.zero();
r.zero();
}
lz = false;
}
void merge(const Node &l, const Node &r) {
sum = l.sum ^ r.sum;
}
void zero() {
sum = 0;
lz = true;
}
};
int N;
vector<int> A, B;
vector<Int> C;
vector<vector<int>> G;
vector<int> par, dis, fin;
vector<int> is;
void dfs(int u, int p) {
par[u] = p;
dis[u] = is.size();
for (const int i : G[u]) {
const int v = A[i] ^ B[i] ^ u;
if (v != p) {
is.push_back(i);
dfs(v, u);
// is.push_back(i);
}
}
fin[u] = is.size();
}
int main() {
for (; ~scanf("%d", &N); ) {
A.resize(N - 1);
B.resize(N - 1);
C.resize(N - 1);
for (int i = 0; i < N - 1; ++i) {
scanf("%d%d%lld", &A[i], &B[i], &C[i]);
--A[i];
--B[i];
}
G.assign(N, {});
for (int i = 0; i < N - 1; ++i) {
G[A[i]].push_back(i);
G[B[i]].push_back(i);
}
par.resize(N);
dis.resize(N);
fin.resize(N);
is.clear();
dfs(0, -1);
SegmentTreeRange<Node> seg(N - 1);
for (int j = 0; j < N - 1; ++j) {
seg.at(j) = Node(C[is[j]]);
}
seg.build();
int Q;
scanf("%d", &Q);
for (; Q--; ) {
int t, x;
scanf("%d%d", &t, &x);
--x;
if (t == 1) {
seg.ch(dis[x] - 1, fin[x], &Node::zero);
} else {
const Node res = seg.get(dis[x], fin[x]);
printf("%lld\n", res.sum);
}
}
#ifdef LOCAL
cerr<<"========"<<endl;
#endif
}
return 0;
}