結果
問題 | No.386 貪欲な領主 |
ユーザー | koyumeishi |
提出日時 | 2016-07-09 00:13:06 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 260 ms / 2,000 ms |
コード長 | 9,813 bytes |
コンパイル時間 | 1,386 ms |
コンパイル使用メモリ | 116,596 KB |
実行使用メモリ | 23,564 KB |
最終ジャッジ日時 | 2024-10-13 07:47:14 |
合計ジャッジ時間 | 3,557 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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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 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 252 ms
23,564 KB |
testcase_05 | AC | 257 ms
17,480 KB |
testcase_06 | AC | 254 ms
16,492 KB |
testcase_07 | AC | 3 ms
5,248 KB |
testcase_08 | AC | 33 ms
5,248 KB |
testcase_09 | AC | 5 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 2 ms
5,248 KB |
testcase_12 | AC | 3 ms
5,248 KB |
testcase_13 | AC | 8 ms
5,248 KB |
testcase_14 | AC | 260 ms
16,508 KB |
testcase_15 | AC | 209 ms
23,564 KB |
ソースコード
/* ### # ############# # ####################### ################################ ######################################### ############################################## # ##################################### # ###### ############################ ###### ########### ################### # ########## ################ ######### ############### #################### # #################### ####### ############## ######################## ######## ######### ######################## ########### ####### ######################## ############## # ####### ######################## ######################## ######################## ######################## ######################## ######################## ######################## ###################### ####################### ################### ################### ############## ############### ########## ########## ###### ###### ## ## # # # # # # # # # # # #### #### #### #### #### # # # # # ## # # # # # # #____# ## # #/ # # ## # # # # # # # #^^^^ # ## ###/# # # # #### #### ###/# #### # # ## */ #include <iostream> #include <vector> #include <cstdio> #include <sstream> #include <map> #include <string> #include <algorithm> #include <queue> #include <cmath> #include <functional> #include <set> #include <ctime> #include <random> #include <chrono> #include <cassert> using namespace std; namespace { using Integer = long long; //__int128; template<class T> istream& operator >> (istream& is, vector<T>& vec){for(T& val: vec) is >> val; return is;} template<class T> istream& operator , (istream& is, T& val){ return is >> val;} template<class T> ostream& operator << (ostream& os, const vector<T>& vec){for(int i=0; i<vec.size(); i++) os << vec[i] << (i==vec.size()-1?"":" "); return os;} template<class T> ostream& operator , (ostream& os, const T& val){ return os << " " << val;} template<class H> void print(const H& head){ cout << head; } template<class H, class ... T> void print(const H& head, const T& ... tail){ cout << head << " "; print(tail...); } template<class ... T> void println(const T& ... values){ print(values...); cout << endl; } template<class H> void eprint(const H& head){ cerr << head; } template<class H, class ... T> void eprint(const H& head, const T& ... tail){ cerr << head << " "; eprint(tail...); } template<class ... T> void eprintln(const T& ... values){ eprint(values...); cerr << endl; } class range{ long long start_, end_, step_; public: struct range_iterator{ long long val, step_; range_iterator(long long v, long long step) : val(v), step_(step) {} long long operator * (){return val;} void operator ++ (){val += step_;} bool operator != (range_iterator& x){return step_ > 0 ? val < x.val : val > x.val;} }; range(long long len) : start_(0), end_(len), step_(1) {} range(long long start, long long end) : start_(start), end_(end), step_(1) {} range(long long start, long long end, long long step) : start_(start), end_(end), step_(step) {} range_iterator begin(){ return range_iterator(start_, step_); } range_iterator end(){ return range_iterator( end_, step_); } }; string operator "" _s (const char* str, size_t size){ return move(string(str)); } constexpr Integer my_pow(Integer x, Integer k, Integer z=1){return k==0 ? z : k==1 ? z*x : (k&1) ? my_pow(x*x,k>>1,z*x) : my_pow(x*x,k>>1,z);} constexpr Integer my_pow_mod(Integer x, Integer k, Integer M, Integer z=1){return k==0 ? z%M : k==1 ? z*x%M : (k&1) ? my_pow_mod(x*x%M,k>>1,M,z*x%M) : my_pow_mod(x*x%M,k>>1,M,z);} constexpr unsigned long long operator "" _ten (unsigned long long value){ return my_pow(10,value); } inline int k_bit(Integer x, int k){return (x>>k)&1;} //0-indexed mt19937 mt(chrono::duration_cast<chrono::nanoseconds>(chrono::steady_clock::now().time_since_epoch()).count()); template<class T> string join(const vector<T>& v, const string& sep){ stringstream ss; for(int i=0; i<v.size(); i++){ if(i>0) ss << sep; ss << v[i]; } return ss.str(); } string operator * (string s, int k){ string ret; while(k){ if(k&1) ret += s; s += s; k >>= 1; } return ret; } } constexpr long long mod = 9_ten + 7; //HL分解 構築O(|v|), 空間O(|v|) class HeavyLightDecomposition{ public: struct heavy_set{ vector<int> element; int depth; int parent_vertex; heavy_set(int v, int d, int par) : element(1,v), depth(d), parent_vertex(par){} }; vector<vector<int>>& G; vector<heavy_set> S; vector<int> subtree_size; vector<int> set_index; vector<int> ele_index; private: int get_subtree_size(int pos, int par){ int sz = 1; for(int ch : G[pos]){ if(ch == par) continue; sz += get_subtree_size(ch, pos); } return subtree_size[pos] = sz; } void make_path(int pos, int par, int set_id){ set_index[pos] = set_id; ele_index[pos] = S[set_id].element.size()-1; int largest_child = -1; int value = 0; for(int ch : G[pos]){ if(ch == par) continue; if(value < subtree_size[ch]){ value = subtree_size[ch]; largest_child = ch; } } for(int ch : G[pos]){ if(ch == par) continue; if(largest_child == ch){ S[set_id].element.push_back(ch); make_path(ch, pos, set_id); }else{ S.emplace_back( ch, S[set_id].depth+1, pos ); make_path(ch, pos, S.size()-1); } } } void init(int root){ subtree_size.resize(G.size(), 0); get_subtree_size(root,root); set_index.resize(G.size(), 0); ele_index.resize(G.size(), 0); S.emplace_back( root,0,root ); make_path( root, root, 0 ); subtree_size.clear(); } public: HeavyLightDecomposition(vector<vector<int>>& G_, int root = 0) : G(G_){ init(root); } //set_index, element_index //S[set_index].element[element_index] == v pair<int,int> get_position(int v){ return {set_index[v], ele_index[v]}; } }; //Lowest Common Ancestor with HL-decomposition tree //O(log n) / query int LCA(HeavyLightDecomposition& T, int u, int v){ auto pu = T.get_position(u); auto pv = T.get_position(v); if(pu.first == pv.first){ return pu.second < pv.second ? u : v; } if(T.S[pu.first].depth > T.S[pv.first].depth){ swap(pu, pv); swap(u,v); } while(T.S[pu.first].depth != T.S[pv.first].depth){ v = T.S[pv.first].parent_vertex; pv = T.get_position( v ); } while(pu.first != pv.first){ u = T.S[pu.first].parent_vertex; v = T.S[pv.first].parent_vertex; pu = T.get_position(u); pv = T.get_position(v); if(T.S[pv.first].depth == 0) break; if(T.S[pv.first].depth == 0) break; } if(pu.first == pv.first){ return pu.second < pv.second ? u : v; }else{ abort(); } return -1; } void Euler_tour(vector<vector<int>>& G, int pos, int last, vector<int>& res){ res.push_back(pos); for(int nx : G[pos]){ if(nx == last) continue; Euler_tour(G, nx, pos, res); } res.push_back(pos); } int main(){ int n; cin >> n; vector<vector<int>> G(n); for(int i :range(n-1)){ int a,b; cin >> a,b; G[a].push_back(b); G[b].push_back(a); } vector<int> u(n); cin >> u; HeavyLightDecomposition t(G, 0); vector<int> e; Euler_tour(G, 0, 0, e); vector<int> o(n, 1e8); vector<int> s(e.size(), 0); for(int i=0; i<e.size(); i++){ o[e[i]] = min(o[e[i]], i); if( o[e[i]] == i){ s[i] = +u[e[i]]; }else{ s[i] = -u[e[i]]; } } for(int i=1; i<s.size(); i++){ s[i] += s[i-1]; } long long ans = 0; int m; cin >> m; while(m--){ int a,b,c; cin >> a,b,c; int p = o[LCA(t, a,b)]; int w = o[a]; int v = o[b]; if(w>v) swap(w,v); long long tmp = 0; tmp += s[w] - (p==0 ? 0 : s[p-1]); tmp += s[v] - s[p]; ans += tmp * c; } println(ans); return 0; }