結果
| 問題 |
No.900 aδδitivee
|
| コンテスト | |
| ユーザー |
はまやんはまやん
|
| 提出日時 | 2019-10-05 08:31:47 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 329 ms / 2,000 ms |
| コード長 | 6,383 bytes |
| コンパイル時間 | 2,510 ms |
| コンパイル使用メモリ | 214,412 KB |
| 最終ジャッジ日時 | 2025-01-07 21:02:27 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 27 |
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; }
//---------------------------------------------------------------------------------------------------
// vid : id -> vid head, heavy, parent : unused
// depth : id -> depth inv : vid -> id
// in(vid), out(vid) : for euler tree [in[v], out[v])
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() { dfs(0, -1); t = 0; dfs_hld(); }
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);
}
};
template<class V, int NV> struct LazySegTree { // [L,R)
vector<V> dat, lazy; LazySegTree() { dat.resize(NV * 2, def); lazy.resize(NV * 2, ldef); }
void update(int a, int b, V v, int k, int l, int r) { push(k, l, r); if (r <= a || b <= l) return;
if (a <= l && r <= b) { setLazy(k, v); push(k, l, r); } else {
update(a, b, v, k * 2 + 1, l, (l + r) / 2); update(a, b, v, k * 2 + 2, (l + r) / 2, r);
dat[k] = comp(dat[k * 2 + 1], dat[k * 2 + 2]);}}
V get(int a, int b, int k, int l, int r) { push(k, l, r); if (r <= a || b <= l) return def;
if (a <= l && r <= b) return dat[k]; auto x = get(a, b, k * 2 + 1, l, (l + r) / 2);
auto y = get(a, b, k * 2 + 2, (l + r) / 2, r); return comp(x, y);}
void update(int a, int b, V v) { update(a, b, v, 0, 0, NV); }
V get(int a, int b) { return get(a, b, 0, 0, NV); }
// ---- Template ---------------------------------------------------------------------------------
// 区間add, 区間総和
const V def = 0, ldef = 0;
V comp(V l, V r) { return l + r; }
void setLazy(int i, V v) { lazy[i] += v; }
void push(int k, int l, int r) {
dat[k] += lazy[k] * (r - l);
if (r - l > 1) { setLazy(k * 2 + 1, lazy[k]); setLazy(k * 2 + 2, lazy[k]); }
lazy[k] = ldef;
}
};
/*---------------------------------------------------------------------------------------------------
∧_∧
∧_∧ (´<_` ) Welcome to My Coding Space!
( ´_ゝ`) / ⌒i @hamayanhamayan
/ \ | |
/ / ̄ ̄ ̄ ̄/ |
__(__ニつ/ _/ .| .|____
\/____/ (u ⊃
---------------------------------------------------------------------------------------------------*/
//---------------------------------------------------------------------------------------------------
int N, U[101010], V[101010], W[101010];
LazySegTree<ll, 1 << 17> st;
ll ans;
//---------------------------------------------------------------------------------------------------
void _main() {
cin >> N;
HLDecomposition hld(N);
rep(i, 0, N - 1) {
cin >> U[i] >> V[i] >> W[i];
hld.add(U[i], V[i]);
}
hld.build();
rep(i, 0, N - 1) {
int v = U[i];
if (hld.depth[v] < hld.depth[V[i]]) v = V[i];
st.update(hld.vid[v], hld.vid[v] + 1, W[i]);
}
int Q; cin >> Q;
rep(q, 0, Q) {
int t; cin >> t;
if (t == 1) {
int a, x;
cin >> a >> x;
st.update(hld.in[a], hld.out[a], x);
st.update(hld.vid[a], hld.vid[a] + 1, -x);
}
else
{
int b;
cin >> b;
ans = 0;
hld.foreach(0, b, [](int x, int y) {
ans += st.get(x, y + 1);
});
printf("%lld\n", ans);
}
}
}
はまやんはまやん