結果
| 問題 |
No.235 めぐるはめぐる (5)
|
| コンテスト | |
| ユーザー |
kei
|
| 提出日時 | 2018-09-25 02:05:31 |
| 言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 8,515 bytes |
| コンパイル時間 | 2,641 ms |
| コンパイル使用メモリ | 201,852 KB |
| 実行使用メモリ | 44,892 KB |
| 最終ジャッジ日時 | 2024-09-25 02:44:12 |
| 合計ジャッジ時間 | 13,167 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge1 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| other | WA * 3 |
ソースコード
#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
const int INF = 1e9;
const ll LINF = 1e18;
template<class S,class T> ostream& operator << (ostream& out,const pair<S,T>& o){ out << "(" << o.first << "," << o.second << ")"; return out; }
template<class T> ostream& operator << (ostream& out,const vector<T> V){ for(int i = 0; i < V.size(); i++){ out << V[i]; if(i!=V.size()-1) out << " ";} return out; }
template<class T> ostream& operator << (ostream& out,const vector<vector<T> > Mat){ for(int i = 0; i < Mat.size(); i++) { if(i != 0) out << endl; out << Mat[i];} return out; }
template<class S,class T> ostream& operator << (ostream& out,const map<S,T> mp){ out << "{ "; for(auto it = mp.begin(); it != mp.end(); it++){ out << it->first << ":" << it->second; if(mp.size()-1 != distance(mp.begin(),it)) out << ", "; } out << " }"; return out; }
/*
<url:https://yukicoder.me/problems/no/235>
問題文============================================================
=================================================================
解説=============================================================
================================================================
*/
// HL-Decomposition
struct HLD{
typedef ll TYPE;
typedef pair<TYPE,TYPE> PTT;
TYPE V; // 頂点数
TYPE root; // 根の頂点番号
vector<vector<TYPE>> G;
// parent : 親
// Hchild : Heavy Childの頂点番号
// number : 新しく割り当てた頂点番号
// id : 割り当て直した数字の元のノード番号 (id[number[pos]] = pos)
// group : 各ノードが属するグループ番号
// depth : 各頂点の深さ
vector<TYPE> parent,Hchild,number,id,group,depth;
vector<PTT> paths; // [u,v]間の経路を分解(最大でもlogN)
vector<PTT> Ledges; // pathsを結ぶライドエッジ
HLD() {root = V = -1; }
HLD(TYPE V):
V(V),root(0),G(V),parent(V,-1),Hchild(V,-1),number(V,-1),id(V,-1),group(V,-1),depth(V,0){}
void init(TYPE V){
V = V; root = 0;
G.clear(); parent.clear(); Hchild.clear(); number.clear();
id.clear(); group.clear(); depth.clear();
G.resize(V); parent.assign(V,-1); Hchild.assign(V,-1);
number.assign(V,-1); id.assign(V,-1); group.assign(V,-1); depth.assign(V,0);
}
void add_edge(TYPE u,TYPE v){ G[u].push_back(v); G[v].push_back(u);}
void build(TYPE _root = 0){
root = _root;
int num = 0;
dfs1(); init_number(num); dfs2();
}
TYPE dfs1(TYPE pos = -1,TYPE pre = -1){
if(pos == -1) pos = root;
TYPE maxw = -1, weight = 1;
for(TYPE next:G[pos]){
if(next == pre) continue;
TYPE child_weight = dfs1(next,pos);
weight += child_weight;
if(maxw < child_weight){ Hchild[pos] = next; maxw = child_weight; }
}
return weight;
}
void dfs2(TYPE pos = -1,TYPE pre = -1,TYPE dep = 0,TYPE g = -1){
if(pos == -1) pos = g = root;
parent[pos] = pre; depth[pos] = dep; group[pos] = g;
for(TYPE next:G[pos]){
if(next == pre) continue;
dfs2(next,pos,dep+1,Hchild[pos]==next?g:next);
}
}
void init_number(int& num,TYPE pos = -1,TYPE pre = -1){
if(pos == -1) pos = root;
number[pos] = num++;
id[number[pos]] = pos;
if(Hchild[pos] >= 0) init_number(num,Hchild[pos],pos);
for(TYPE next:G[pos]){
if(next != pre && next != Hchild[pos]) init_number(num,next,pos);
}
}
void buildPaths(TYPE u,TYPE v){
if(depth[group[u]] < depth[group[v]]) swap(u,v);
TYPE num_u=number[u], num_v=number[v];
if(same(u,v)){ paths.push_back({min(num_u,num_v),max(num_u,num_v)}); return;}
TYPE group_u = group[u];
buildPaths(parent[group_u],v);
paths.push_back({number[group_u], number[u]});
Ledges.push_back({number[parent[group_u]], number[group_u]});
}
TYPE lca(TYPE u,TYPE v){
if(depth[group[u]] < depth[group[v]]) swap(u,v);
if(same(u,v)) return depth[u] < depth[v]?u:v;
return lca(parent[group[u]],v);
}
TYPE distance(TYPE u,TYPE v){
return depth[u] + depth[v] - 2*depth[lca(u,v)];
}
// u<->vへのパス 、 u<->vをつなぐライトエッジを返却
pair<vector<PTT>,vector<PTT>> getPath(TYPE u,TYPE v){
paths.clear(); Ledges.clear();
buildPaths(u,v);
return make_pair(paths,Ledges);
}
bool same(TYPE a,TYPE b){return group[a] == group[b];}
};
const ll MAX_N = 10;
const ll MOD = 1e9+7;
ll Inv[MAX_N];
void Inv_init(){
Inv[1] = 1;
for(int i = 2; i < MAX_N; i++) {
Inv[i] = Inv[MOD%i] * (MOD - MOD/i) % MOD;
}
}
/*
update : [s,t)にxを加算する
query : [s,t) の総和を出力する
*/
const pll INIT = {0,0};
void operator += (pll& p1,const pll p2){
(p1.first+=p2.first)%=MOD;
(p1.second+=p2.second)%=MOD;
}
pll operator + (const pll& p1,const pll p2){
return make_pair((p1.first+p2.first)%MOD,(p1.second+p2.second)%MOD);
}
pll operator / (const pll& p,const int v){
return make_pair(p.first*Inv[v]%MOD,p.second*Inv[v]%MOD);
}
struct SegTree {
int N;
pll init_v;
vector<pll> node, lazy;
SegTree(int _N):init_v(INIT) {
N = 1;
while (N < _N) N *= 2;
node.resize(2 * N - 1, init_v);
lazy.resize(2 * N - 1, init_v);
}
void build(){
for(int k = N - 2; k >= 0; k--){ node[k] = node[2 * k + 1] + node[2 * k + 2];}
}
pll merge(pll l,pll r){
return (l + r);
}
void lazy_evaluate(int k) {
node[k] += lazy[k]; // add のため加算
if (k < N - 1) {
lazy[2 * k + 1] += lazy[k] / 2; // add のため加算
lazy[2 * k + 2] += lazy[k] / 2;
}
lazy[k] = INIT;
}
/* [a,b) 引数の範囲に注意!! s~tまでを更新→update(s,t+1,~) */
pll update(ll a, ll b, ll x) { return update(a, b, 0, 0, N, x); }
pll update(ll a, ll b, int k, ll l, ll r, ll x) {
if (r <= a || b <= l) {
lazy_evaluate(k); // nodeを参照する前には必ず更新
return node[k];
}
if (a <= l && r <= b) {
(lazy[k].first += node[k].second*x%MOD)%=MOD;
lazy_evaluate(k);
return node[k];
}
else {
lazy_evaluate(k);
pll vl = update(a, b, 2 * k + 1, l, (l + r) / 2, x);
pll vr = update(a, b, 2 * k + 2, (l + r) / 2, r, x);
return node[k] = merge(vl,vr);
}
}
/* [a,b) 引数の範囲に注意!! */
pll query(int a, int b) { return query(a, b, 0, 0, N); }
pll query(int a, int b, int k, int l, int r) {
if (r <= a || b <= l) return init_v;
if (a <= l && r <= b) {
lazy_evaluate(k);
return node[k];
}
else {
lazy_evaluate(k);
pll vl = query(a, b, 2 * k + 1, l, (l + r) / 2);
pll vr = query(a, b, 2 * k + 2, (l + r) / 2, r);
return merge(vl,vr);
}
}
};
void solve(){
Inv_init();
int N; cin >> N;
vector<pll> SC(N);
for(auto& in:SC) cin >> in.first;
for(auto& in:SC) cin >> in.second;
HLD hld(N);
for(int i = 0; i < N-1;i++){
ll A,B; cin >> A >> B; A--; B--;
hld.add_edge(A, B);
}
hld.build();
SegTree ST(N);
for(int i = 0; i < N;i++){
ST.node[hld.number[i] + N - 1] = SC[i];
}
ST.build();
ll Q; cin >> Q;
auto query0 = [&](ll x,ll y,ll z){
auto path = hld.getPath(x, y).first;
for(auto p:path){
ll l = p.first,r = p.second;
ST.update(l,r+1,z);
}
};
auto query1 = [&](ll x,ll y){
auto path = hld.getPath(x, y).first;
ll ret = 0;
for(auto p:path){
ll l = p.first, r= p.second;
(ret += ST.query(l,r+1).first)%=MOD;
}
return ret;
};
while(Q--){
int com; cin >> com;
if(com == 0){
ll X,Y,Z; cin >> X >> Y >> Z;
X--; Y--;
query0(X,Y,Z);
}else{
ll X,Y; cin >> X >> Y;
X--; Y--;
cout << query1(X,Y) << endl;
}
}
}
int main(void) {
cin.tie(0); ios_base::sync_with_stdio(false);
solve();
return 0;
}
kei