結果
| 問題 |
No.1030 だんしんぐぱーりない
|
| コンテスト | |
| ユーザー |
はまやんはまやん
|
| 提出日時 | 2020-04-18 12:38:50 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 373 ms / 2,000 ms |
| コード長 | 5,888 bytes |
| コンパイル時間 | 3,179 ms |
| コンパイル使用メモリ | 213,328 KB |
| 最終ジャッジ日時 | 2025-01-09 21:09:33 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 40 |
ソースコード
#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)
#define fore(i,a) for(auto &i:a)
#define all(x) (x).begin(),(x).end()
//#pragma GCC optimize ("-O3")
using namespace std; void _main(); int main() { cin.tie(0); ios::sync_with_stdio(false); _main(); }
typedef long long ll; const int inf = INT_MAX / 2; const ll infl = 1LL << 60;
template<class T>bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }
//---------------------------------------------------------------------------------------------------
struct HLDecomposition {
vector<set<int>> g; vector<int> vid, head, heavy, parent, depth, inv, in, out;
HLDecomposition() {} HLDecomposition(int n) { init(n); }
void init(int n) {
g.resize(n); vid.resize(n, -1); head.resize(n); heavy.resize(n, -1);
parent.resize(n); depth.resize(n); inv.resize(n); in.resize(n); out.resize(n);
}
void add(int u, int v) { g[u].insert(v); g[v].insert(u); }
void build(int root) { dfs(root, -1); t = 0; dfs_hld(root); }
int dfs(int curr, int prev) {
parent[curr] = prev; int sub = 1, max_sub = 0;
heavy[curr] = -1;
for (int next : g[curr]) if (next != prev) {
depth[next] = depth[curr] + 1;
int sub_next = dfs(next, curr); sub += sub_next;
if (max_sub < sub_next) max_sub = sub_next, heavy[curr] = next;
}return sub;
}
int t = 0;
void dfs_hld(int v = 0)
{
vid[v] = in[v] = t;
t++;
inv[in[v]] = v;
if (0 <= heavy[v]) {
head[heavy[v]] = head[v];
dfs_hld(heavy[v]);
}
for (auto u : g[v]) if(depth[v] < depth[u]) if (u != heavy[v]) {
head[u] = u;
dfs_hld(u);
}
out[v] = t;
}
void foreach(int u, int v, function<void(int, int)> f) { // [x,y]
if (vid[u] > vid[v]) swap(u, v); f(max(vid[head[v]], vid[u]), vid[v]);
if (head[u] != head[v]) foreach(u, parent[head[v]], f);
}
int ancestor(int from, int times) {
while (true) {
if (depth[head[from]] > depth[from] - times) {
times -= depth[from] - depth[head[from]] + 1; if (head[from] == 0)return -1; from = parent[head[from]];
}
else return inv[vid[from] - times];
}
}
int lca(int u, int v) {
if (vid[u] > vid[v]) swap(u, v); if (head[u] == head[v]) return u;
return lca(u, parent[head[v]]);
}
int distance(int u, int v) { return depth[u] + depth[v] - 2 * depth[lca(u, v)]; }
int child(int parent, int child, int times) {
assert(depth[parent]<depth[child]);
int d = distance(parent, child); assert(times - 1 <= d); return ancestor(child, d - times);
}
int go(int from, int to, int times) {
int d = distance(from, to); assert(0 <= times and times <= d);
int lc = lca(from, to); if (lc == to)return ancestor(from, times); if (lc == from)return child(from, to, times);
int dd = distance(from, lc); if (dd <= times)return go(lc, to, times - dd); return ancestor(from, times);
}
};
HLDecomposition hld;
#define def -1
template<class V, int NV> struct SegTree { //[l,r)
V comp(V& l, V& r) {
if (l < 0) return r;
if (r < 0) return l;
return hld.lca(l, r);
};
vector<V> val; SegTree() { val = vector<V>(NV * 2, def); }
V get(int x, int y, int l = 0, int r = NV, int k = 1) {
if (r <= x || y <= l)return def; if (x <= l && r <= y)return val[k];
auto a = get(x, y, l, (l + r) / 2, k * 2);
auto b = get(x, y, (l + r) / 2, r, k * 2 + 1);
return comp(a, b);
}
void update(int i, V v) {
i += NV; val[i] = v;
while (i > 1) i >>= 1, val[i] = comp(val[i * 2], val[i * 2 + 1]);
}
void add(int i, V v) { update(i, val[i + NV] + v); }
V operator[](int x) { return get(x, x + 1); }
};
/*---------------------------------------------------------------------------------------------------
∧_∧
∧_∧ (´<_` ) Welcome to My Coding Space!
( ´_ゝ`) / ⌒i @hamayanhamayan0
/ \ | |
/ / ̄ ̄ ̄ ̄/ |
__(__ニつ/ _/ .| .|____
\/____/ (u ⊃
---------------------------------------------------------------------------------------------------*/
int N, K, Q;
int C[101010], A[101010];
vector<int> E[101010];
SegTree<int, 1 << 17> st;
//---------------------------------------------------------------------------------------------------
void dfs(int cu, int pa = -1) {
fore(to, E[cu]) if (to != pa) {
chmax(C[to], C[cu]);
dfs(to, cu);
}
}
//---------------------------------------------------------------------------------------------------
void _main() {
cin >> N >> K >> Q;
rep(i, 0, N) cin >> C[i];
rep(i, 0, K) cin >> A[i];
hld.init(N);
rep(i, 0, N - 1) {
int a, b; cin >> a >> b;
a--; b--;
E[a].push_back(b);
E[b].push_back(a);
hld.add(a, b);
}
hld.build(0);
dfs(0);
rep(i, 0, K) st.update(i, A[i] - 1);
rep(_, 0, Q) {
int T; cin >> T;
if (T == 1) {
int X, Y; cin >> X >> Y;
X--; Y--;
st.update(X, Y);
}
else {
int L, R; cin >> L >> R;
L--;
int ans = C[st.get(L, R)];
printf("%d\n", ans);
}
}
}
はまやんはまやん