結果
| 問題 |
No.1790 Subtree Deletion
|
| コンテスト | |
| ユーザー |
 Nachia
|
| 提出日時 | 2021-12-11 17:24:00 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 2,339 ms / 3,000 ms |
| コード長 | 11,562 bytes |
| コンパイル時間 | 2,980 ms |
| コンパイル使用メモリ | 93,368 KB |
| 実行使用メモリ | 89,040 KB |
| 最終ジャッジ日時 | 2024-09-15 14:10:39 |
| 合計ジャッジ時間 | 29,690 ms |
|
ジャッジサーバーID （参考情報） |
judge4 / judge1 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 12 |
ソースコード
package nachia.competitive.atcoder;
import java.util.ArrayList;
import java.util.Scanner;
import java.util.function.BiFunction;
import java.util.function.BinaryOperator;
public class Main {
/*
* begin
*
* AtCoderLibraryForJava by NASU41, suisen-cp and others
* repository : https://github.com/NASU41/AtCoderLibraryForJava
* code : https://github.com/NASU41/AtCoderLibraryForJava/blob/master/LazySegTree/LazySegTree.java
*
*/
class LazySegTree<S, F> {
final int MAX;
final int N;
final int Log;
final java.util.function.BinaryOperator<S> Op;
final S E;
final java.util.function.BiFunction<F, S, S> Mapping;
final java.util.function.BinaryOperator<F> Composition;
final F Id;
final S[] Dat;
final F[] Laz;
@SuppressWarnings("unchecked")
public LazySegTree(int n, java.util.function.BinaryOperator<S> op, S e, java.util.function.BiFunction<F, S, S> mapping, java.util.function.BinaryOperator<F> composition, F id) {
this.MAX = n;
int k = 1;
while (k < n) k <<= 1;
this.N = k;
this.Log = Integer.numberOfTrailingZeros(N);
this.Op = op;
this.E = e;
this.Mapping = mapping;
this.Composition = composition;
this.Id = id;
this.Dat = (S[]) new Object[N << 1];
this.Laz = (F[]) new Object[N];
java.util.Arrays.fill(Dat, E);
java.util.Arrays.fill(Laz, Id);
}
public LazySegTree(S[] dat, java.util.function.BinaryOperator<S> op, S e, java.util.function.BiFunction<F, S, S> mapping, java.util.function.BinaryOperator<F> composition, F id) {
this(dat.length, op, e, mapping, composition, id);
build(dat);
}
private void build(S[] dat) {
int l = dat.length;
System.arraycopy(dat, 0, Dat, N, l);
for (int i = N - 1; i > 0; i--) {
Dat[i] = Op.apply(Dat[i << 1 | 0], Dat[i << 1 | 1]);
}
}
private void push(int k) {
if (Laz[k] == Id) return;
int lk = k << 1 | 0, rk = k << 1 | 1;
Dat[lk] = Mapping.apply(Laz[k], Dat[lk]);
Dat[rk] = Mapping.apply(Laz[k], Dat[rk]);
if (lk < N) Laz[lk] = Composition.apply(Laz[k], Laz[lk]);
if (rk < N) Laz[rk] = Composition.apply(Laz[k], Laz[rk]);
Laz[k] = Id;
}
private void pushTo(int k) {
for (int i = Log; i > 0; i--) push(k >> i);
}
private void pushTo(int lk, int rk) {
for (int i = Log; i > 0; i--) {
if (((lk >> i) << i) != lk) push(lk >> i);
if (((rk >> i) << i) != rk) push(rk >> i);
}
}
private void updateFrom(int k) {
k >>= 1;
while (k > 0) {
Dat[k] = Op.apply(Dat[k << 1 | 0], Dat[k << 1 | 1]);
k >>= 1;
}
}
private void updateFrom(int lk, int rk) {
for (int i = 1; i <= Log; i++) {
if (((lk >> i) << i) != lk) {
int lki = lk >> i;
Dat[lki] = Op.apply(Dat[lki << 1 | 0], Dat[lki << 1 | 1]);
}
if (((rk >> i) << i) != rk) {
int rki = (rk - 1) >> i;
Dat[rki] = Op.apply(Dat[rki << 1 | 0], Dat[rki << 1 | 1]);
}
}
}
public void set(int p, S x) {
exclusiveRangeCheck(p);
p += N;
pushTo(p);
Dat[p] = x;
updateFrom(p);
}
public S get(int p) {
exclusiveRangeCheck(p);
p += N;
pushTo(p);
return Dat[p];
}
public S prod(int l, int r) {
if (l > r) {
throw new IllegalArgumentException(
String.format("Invalid range: [%d, %d)", l, r)
);
}
inclusiveRangeCheck(l);
inclusiveRangeCheck(r);
if (l == r) return E;
l += N; r += N;
pushTo(l, r);
S sumLeft = E, sumRight = E;
while (l < r) {
if ((l & 1) == 1) sumLeft = Op.apply(sumLeft, Dat[l++]);
if ((r & 1) == 1) sumRight = Op.apply(Dat[--r], sumRight);
l >>= 1; r >>= 1;
}
return Op.apply(sumLeft, sumRight);
}
public S allProd() {
return Dat[1];
}
public void apply(int p, F f) {
exclusiveRangeCheck(p);
p += N;
pushTo(p);
Dat[p] = Mapping.apply(f, Dat[p]);
updateFrom(p);
}
public void apply(int l, int r, F f) {
if (l > r) {
throw new IllegalArgumentException(
String.format("Invalid range: [%d, %d)", l, r)
);
}
inclusiveRangeCheck(l);
inclusiveRangeCheck(r);
if (l == r) return;
l += N; r += N;
pushTo(l, r);
for (int l2 = l, r2 = r; l2 < r2;) {
if ((l2 & 1) == 1) {
Dat[l2] = Mapping.apply(f, Dat[l2]);
if (l2 < N) Laz[l2] = Composition.apply(f, Laz[l2]);
l2++;
}
if ((r2 & 1) == 1) {
r2--;
Dat[r2] = Mapping.apply(f, Dat[r2]);
if (r2 < N) Laz[r2] = Composition.apply(f, Laz[r2]);
}
l2 >>= 1; r2 >>= 1;
}
updateFrom(l, r);
}
public int maxRight(int l, java.util.function.Predicate<S> g) {
inclusiveRangeCheck(l);
if (!g.test(E)) {
throw new IllegalArgumentException("Identity element must satisfy the condition.");
}
if (l == MAX) return MAX;
l += N;
pushTo(l);
S sum = E;
do {
l >>= Integer.numberOfTrailingZeros(l);
if (!g.test(Op.apply(sum, Dat[l]))) {
while (l < N) {
push(l);
l = l << 1;
if (g.test(Op.apply(sum, Dat[l]))) {
sum = Op.apply(sum, Dat[l]);
l++;
}
}
return l - N;
}
sum = Op.apply(sum, Dat[l]);
l++;
} while ((l & -l) != l);
return MAX;
}
public int minLeft(int r, java.util.function.Predicate<S> g) {
inclusiveRangeCheck(r);
if (!g.test(E)) {
throw new IllegalArgumentException("Identity element must satisfy the condition.");
}
if (r == 0) return 0;
r += N;
pushTo(r - 1);
S sum = E;
do {
r--;
while (r > 1 && (r & 1) == 1) r >>= 1;
if (!g.test(Op.apply(Dat[r], sum))) {
while (r < N) {
push(r);
r = r << 1 | 1;
if (g.test(Op.apply(Dat[r], sum))) {
sum = Op.apply(Dat[r], sum);
r--;
}
}
return r + 1 - N;
}
sum = Op.apply(Dat[r], sum);
} while ((r & -r) != r);
return 0;
}
private void exclusiveRangeCheck(int p) {
if (p < 0 || p >= MAX) {
throw new IndexOutOfBoundsException(
String.format("Index %d is not in [%d, %d).", p, 0, MAX)
);
}
}
private void inclusiveRangeCheck(int p) {
if (p < 0 || p > MAX) {
throw new IndexOutOfBoundsException(
String.format("Index %d is not in [%d, %d].", p, 0, MAX)
);
}
}
// **************** DEBUG **************** //
private int indent = 6;
public void setIndent(int newIndent) {
this.indent = newIndent;
}
@Override
public String toString() {
return toSimpleString();
}
private S[] simulatePushAll() {
S[] simDat = java.util.Arrays.copyOf(Dat, 2 * N);
F[] simLaz = java.util.Arrays.copyOf(Laz, 2 * N);
for (int k = 1; k < N; k++) {
if (simLaz[k] == Id) continue;
int lk = k << 1 | 0, rk = k << 1 | 1;
simDat[lk] = Mapping.apply(simLaz[k], simDat[lk]);
simDat[rk] = Mapping.apply(simLaz[k], simDat[rk]);
if (lk < N) simLaz[lk] = Composition.apply(simLaz[k], simLaz[lk]);
if (rk < N) simLaz[rk] = Composition.apply(simLaz[k], simLaz[rk]);
simLaz[k] = Id;
}
return simDat;
}
/*
public String toDetailedString() {
return toDetailedString(1, 0, simulatePushAll());
}
private String toDetailedString(int k, int sp, S[] dat) {
if (k >= N) return indent(sp) + dat[k];
String s = "";
s += toDetailedString(k << 1 | 1, sp + indent, dat);
s += "\n";
s += indent(sp) + dat[k];
s += "\n";
s += toDetailedString(k << 1 | 0, sp + indent, dat);
return s;
}
private static String indent(int n) {
StringBuilder sb = new StringBuilder();
while (n --> 0) sb.append(' ');
return sb.toString();
}
*/
public String toSimpleString() {
S[] dat = simulatePushAll();
StringBuilder sb = new StringBuilder();
sb.append('[');
for (int i = 0; i < N; i++) {
sb.append(dat[i + N]);
if (i < N - 1) sb.append(',').append(' ');
}
sb.append(']');
return sb.toString();
}
}
// end
class Edge {
public int to;
public long a;
}
int N;
ArrayList<ArrayList<Edge>> E;
int in_time[];
int out_time[];
int dfs_time;
long A[];
long alist[];
void dfs(int p, int pre) {
in_time[p] = dfs_time;
dfs_time++;
ArrayList<Edge> nxlist = E.get(p);
for(int i=0; i<nxlist.size(); i++) {
Edge nx = nxlist.get(i);
if(nx.to == pre) continue;
A[nx.to] = nx.a;
dfs(nx.to, p);
}
out_time[p] = dfs_time;
}
void solve() {
Scanner sc = new Scanner(System.in);
N = sc.nextInt();
E = new ArrayList<>();
for(int i=0; i<N; i++) E.add(new ArrayList<>());
for(int i=0; i<N-1; i++) {
int u = sc.nextInt(); u--;
int v = sc.nextInt(); v--;
long a = sc.nextLong();
Edge e1 = new Edge(); e1.to = v; e1.a = a;
E.get(u).add(e1);
Edge e2 = new Edge(); e2.to = u; e2.a = a;
E.get(v).add(e2);
}
dfs_time = 0;
in_time = new int[N];
out_time = new int[N];
A = new long[N];
dfs(0, -1);
Long rq_init_buf[] = new Long[N];
for(int i=0; i<N; i++) rq_init_buf[in_time[i]] = Long.valueOf(A[i]);
Long rq_e = Long.valueOf(0);
Long rq_id = Long.valueOf(-1);
BinaryOperator<Long> rq_op = (a, b) -> { return a ^ b; };
BiFunction<Long, Long, Long> rq_mapping = (f, x) -> { return (f.compareTo(rq_id) == 0) ? x : f; };
BinaryOperator<Long> rq_composition = (f, x) -> { return (f.compareTo(rq_id) == 0) ? x : f; };
LazySegTree<Long, Long> rq = new LazySegTree<Long, Long>(rq_init_buf, rq_op, rq_e, rq_mapping, rq_composition, rq_id);
int Q = sc.nextInt();
for(int i=0; i<Q; i++) {
int t = sc.nextInt();
if(t == 1) {
int x = sc.nextInt(); x--;
int l = in_time[x];
int r = out_time[x];
rq.apply(l, r, Long.valueOf(0));
}
if(t == 2) {
int x = sc.nextInt(); x--;
int l = in_time[x] + 1;
int r = out_time[x];
long res = rq.prod(l, r);
System.out.println(res);
}
}
sc.close();
}
public static void main(String[] args) {
Main solver = new Main();
solver.solve();
}
}