結果
問題 | No.235 めぐるはめぐる (5) |
ユーザー | kei |
提出日時 | 2018-09-25 02:59:55 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 8,344 bytes |
コンパイル時間 | 2,603 ms |
コンパイル使用メモリ | 198,280 KB |
実行使用メモリ | 40,704 KB |
最終ジャッジ日時 | 2024-10-01 06:58:52 |
合計ジャッジ時間 | 4,727 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | WA | - |
testcase_01 | WA | - |
testcase_02 | WA | - |
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 = make_pair(0, 0); struct SegTree { int N; pll init_v; vector<pll> node; vector<ll> 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, 0); } void build(){ for(int k = N - 2; k >= 0; k--){ node[k] = merge(node[2*k+1],node[2*k+2]); } } pll merge(pll l,pll r){ pll ret = INIT; ret.first = (l.first + r.first)%MOD; ret.second += (l.second + r.second)%MOD; return ret; } void lazy_evaluate(ll k) { lazy[k]%=MOD; (node[k].first += lazy[k]*node[k].second%MOD)%=MOD; if (k < N - 1) { (lazy[2 * k + 1] += lazy[k])%=MOD; (lazy[2 * k + 2] += lazy[k])%=MOD; } lazy[k] = 0; } /* [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, int l, int 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] += x)%=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(ll a, ll b) { return query(a, b, 0, 0, N); } pll query(ll a, ll b, ll k, ll l, ll 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] + ST.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; }; int count = 10; while(Q--&&count--){ 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; }