結果
| 問題 |
No.2342 Triple Tree Query (Hard)
|
| コンテスト | |
| ユーザー |
vjudge1
|
| 提出日時 | 2025-08-11 15:04:48 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 1,027 ms / 10,000 ms |
| コード長 | 5,427 bytes |
| コンパイル時間 | 4,192 ms |
| コンパイル使用メモリ | 298,600 KB |
| 実行使用メモリ | 112,472 KB |
| 最終ジャッジ日時 | 2025-08-11 15:05:17 |
| 合計ジャッジ時間 | 27,248 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 36 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int> ;
const int mod = 998244353;
void Add(int &x, ll y) { x = (x + y) % mod; }
const int kN = 1e5 + 5, kR = 15, kS = kN * 4;
int cid, n, q, K, tot;
int a[kN];
int fa[kN], dep[kN], siz[kN], son[kN], top[kN], dfn[kN], rev[kN];
vector<int> g[kN];
vector<pii> sub[kN], ch[kN];
vector<pii> subr[kN][kR];
struct Tag {
int a, b;
Tag() { a = 1, b = 0; }
Tag(int _a, int _b) { a = _a, b = _b; }
bool Empty() { return (a == 1) && !b; }
};
Tag& operator *= (Tag &x, Tag y) { return x = Tag((ll)x.a * y.a % mod, ((ll)x.b * y.a + y.b) % mod); }
int& operator *= (int &x, Tag y) { return x = ((ll)x * y.a + y.b) % mod; }
#define ls (o << 1)
#define rs (o << 1 | 1)
struct SGT {
int sum[kS];
Tag tag[kS];
void Up(int o) { sum[o] = (sum[ls] + sum[rs]) % mod; }
void Build(int o, int l, int r) {
if(l == r) return void(sum[o] = a[rev[l]]);
int mid = (l + r) >> 1;
Build(ls, l, mid);
Build(rs, mid + 1, r);
Up(o);
}
void Adt(int o, Tag t) { sum[o] *= t, tag[o] *= t; }
void Dn(int o) {
if(!tag[o].Empty()) {
Adt(ls, tag[o]), Adt(rs, tag[o]), tag[o] = Tag();
}
}
void Update(int o, int l, int r, int x, int y, Tag t) {
if((l > y) || (r < x)) return ;
if((l >= x) && (r <= y)) return Adt(o, t);
Dn(o);
int mid = (l + r) >> 1;
Update(ls, l, mid, x, y, t);
Update(rs, mid + 1, r, x, y, t);
Up(o);
}
int Get(int o, int l, int r, int x) {
if(l == r) return sum[o];
Dn(o);
int mid = (l + r) >> 1;
if(mid < x) return Get(rs, mid + 1, r, x);
return Get(ls, l, mid, x);
}
}sgt;
void DFS(int x, int fa) {
siz[x] = 1;
::fa[x] = fa;
dep[x] = dep[fa] + 1;
for(int to : g[x]) {
if(to == fa) continue;
DFS(to, x);
siz[x] += siz[to];
if(siz[son[x]] < siz[to]) son[x] = to;
}
}
void DFS2(int x, int tp) {
top[x] = tp;
if(son[x]) DFS2(son[x], tp);
for(int to : g[x]) {
if((to != son[x]) && (to != fa[x])) DFS2(to, to);
}
}
void BFS(int x) {
queue<int> q;
for(int i = x; i; i = son[i]) {
for(int to : g[i]) {
if((to != fa[i]) && (to != son[i])) q.push(to);
}
}
for(int d = 1; d <= K; d++) {
for(int siz = q.size(); siz--; ) {
int cur = q.front(); q.pop();
if(!dfn[cur]) {
dfn[cur] = ++tot;
rev[tot] = cur;
}
for(int to : g[cur]) {
if(to != fa[cur]) q.push(to);
}
}
}
}
void Label(int x) {
if(top[x] == x) {
int cl = 0, cr = -1;
int nl = n + 1, nr = 0;
for(int i = x; i; i = son[i]) {
if(dfn[i]) {
if(cr + 1 != dfn[i]) {
if(cl <= cr) ch[x].emplace_back(cl, cr);
cl = cr = dfn[i];
}else cr = dfn[i];
continue;
}
dfn[i] = ++tot;
rev[tot] = i;
nl = min(nl, tot);
nr = max(nr, tot);
}
if(cl <= cr) {
ch[x].emplace_back(cl, cr);
cl = 0, cr = -1;
}
if(nl <= nr) ch[x].emplace_back(nl, nr);
BFS(x);
}
for(int to : g[x]) {
if(to != fa[x]) Label(to);
}
}
void DFS3(int x, int fa) {
vector<int> son;
for(int to : g[x]) {
if(to == fa) continue;
DFS3(to, x);
son.push_back(to);
}
auto Get = [&](vector<pii> tmp, vector<pii> &ans) {
sort(tmp.begin(), tmp.end());
int siz = tmp.size();
for(int l = 0, r; l < siz; l = r + 1) {
for(r = l; (r + 1 < siz) && (tmp[r + 1].first == tmp[r].second + 1); r++) ;
ans.emplace_back(tmp[l].first, tmp[r].second);
}
};
subr[x][0].emplace_back(dfn[x], dfn[x]);
vector<pii> tmp {pii {dfn[x], dfn[x]}};
for(int to : son) tmp.insert(tmp.end(), sub[to].begin(), sub[to].end());
Get(tmp, sub[x]);
for(int d = 1; d <= K; d++) {
vector<pii> tmp;
for(int to : son) {
vector<pii> &vec = subr[to][d - 1];
tmp.insert(tmp.end(), vec.begin(), vec.end());
}
Get(tmp, subr[x][d]);
if(subr[x][d].empty()) continue;
}
}
void F(vector<pii> &v, Tag t, int l, int r) {
for(pii seg : v) {
int sl = seg.first;
int sr = seg.second;
sl = max(sl, l);
sr = min(sr, r);
if(sl <= sr) sgt.Update(1, 1, n, sl, sr, t);
}
}
void Update1(int x, int rng, Tag t) {
for(int i = x, j = rng; ~j; i = fa[i], j--) {
if(i == 1) {
for(int k = 0; k <= j; k++) F(subr[1][k], t, 0, n);
break;
}
F(subr[i][j], t, 0, n);
if(j) F(subr[i][j - 1], t, 0, n);
}
}
void Update2(int x, Tag t) { F(sub[x], t, 0, n); }
void Update3(int x, int y, Tag t) {
while(top[x] != top[y]) {
if(dep[top[x]] < dep[top[y]]) swap(x, y);
F(ch[top[x]], t, 0, dfn[x]);
x = fa[top[x]];
}
if(dfn[x] > dfn[y]) swap(x, y);
F(ch[top[x]], t, dfn[x], dfn[y]);
}
int main() {
ios::sync_with_stdio(0), cin.tie(0);
cin >> n >> q, K = 10;
for(int i = 1; i < n; i++) {
int u, v;
cin >> u >> v;
g[u].push_back(v);
g[v].push_back(u);
}
for(int i = 1; i <= n; i++) cin >> a[i];
DFS(1, 0), DFS2(1, 1), Label(1);
DFS3(1, 0);
sgt.Build(1, 1, n);
for(int i = 1; i <= q; i++) {
int op, x, y, p, v;
cin >> op;
if(op == 1) {
cin >> x;
cout << sgt.Get(1, 1, n, dfn[x]) << "\n";
}else if(op == 2) {
cin >> x >> y >> p >> v;
Update1(x, y, Tag(p, v));
}else if(op == 3) {
cin >> x >> p >> v;
Update2(x, Tag(p, v));
}else {
cin >> x >> y >> p >> v;
Update3(x, y, Tag(p, v));
}
}
return 0;
}
vjudge1