結果
問題 | No.1002 Twotone |
ユーザー | momohara |
提出日時 | 2020-05-22 18:50:56 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,359 ms / 5,000 ms |
コード長 | 5,095 bytes |
コンパイル時間 | 2,109 ms |
コンパイル使用メモリ | 203,396 KB |
実行使用メモリ | 54,016 KB |
最終ジャッジ日時 | 2024-10-05 06:51:37 |
合計ジャッジ時間 | 14,782 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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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 | 1 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 331 ms
18,176 KB |
testcase_04 | AC | 431 ms
22,784 KB |
testcase_05 | AC | 437 ms
22,588 KB |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | AC | 176 ms
15,104 KB |
testcase_08 | AC | 335 ms
22,696 KB |
testcase_09 | AC | 337 ms
22,784 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 373 ms
19,584 KB |
testcase_12 | AC | 528 ms
24,540 KB |
testcase_13 | AC | 524 ms
24,704 KB |
testcase_14 | AC | 2 ms
5,248 KB |
testcase_15 | AC | 243 ms
15,488 KB |
testcase_16 | AC | 518 ms
24,576 KB |
testcase_17 | AC | 568 ms
24,448 KB |
testcase_18 | AC | 2 ms
5,248 KB |
testcase_19 | AC | 542 ms
24,960 KB |
testcase_20 | AC | 664 ms
32,512 KB |
testcase_21 | AC | 671 ms
32,104 KB |
testcase_22 | AC | 2 ms
5,248 KB |
testcase_23 | AC | 421 ms
22,528 KB |
testcase_24 | AC | 880 ms
33,892 KB |
testcase_25 | AC | 836 ms
33,792 KB |
testcase_26 | AC | 2 ms
5,248 KB |
testcase_27 | AC | 71 ms
16,476 KB |
testcase_28 | AC | 109 ms
21,432 KB |
testcase_29 | AC | 101 ms
21,432 KB |
testcase_30 | AC | 2 ms
5,248 KB |
testcase_31 | AC | 98 ms
21,156 KB |
testcase_32 | AC | 102 ms
21,120 KB |
testcase_33 | AC | 99 ms
21,224 KB |
testcase_34 | AC | 1,359 ms
54,016 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define rep(i,m,n) for(int (i)=(int)(m);i<(int)(n);++i) #define rep2(i,m,n) for(int (i)=(int)(n)-1;i>=(int)(m);--i) #define REP(i,n) rep(i,0,n) #define REP2(i,n) rep2(i,0,n) #define FOR(i,c) for(decltype((c).begin())i=(c).begin();i!=(c).end();++i) #define all(hoge) (hoge).begin(),(hoge).end() #define en '\n' using ll = long long; using ull = unsigned long long; template <class T> using vec = vector<T>; template <class T> using vvec = vector<vec<T>>; typedef pair<ll, ll> P; constexpr long long INF = 1LL << 60; constexpr int INF_INT = 1 << 25; constexpr long long MOD = (ll) 1e9 + 7; //constexpr long long MOD = 998244353LL; using ld=long double; static const ld pi = 3.141592653589793L; typedef vector<ll> Array; typedef vector<Array> Matrix; template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return true; } return false; } template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return true; } return false; } struct Edge { ll to, cap, rev; Edge(ll _to, ll _cap, ll _rev) { to = _to; cap = _cap; rev = _rev; } }; using Edges = vector<Edge>; using Graph = vector<Edges>; void add_edge(Graph& G, ll from, ll to, ll cap, bool revFlag, ll revCap) { G[from].push_back(Edge(to, cap, (ll)G[to].size())); if (revFlag)G[to].push_back(Edge(from, revCap, (ll)G[from].size() - 1)); } class CentroidDecomposition { Graph& g; ll n; vector<int> sz, dead; public: CentroidDecomposition(Graph& _g) :g(_g),n(g.size()),sz(n, 1), dead(n, 0) {} ll szdfs(ll v, ll par) { sz[v] = 1; for (auto e : g[v]) if (e.to != par && !dead[e.to]) sz[v] += szdfs(e.to, v); return sz[v]; } void find(ll v, ll par, ll tmp, Array& cs) { ll ok = 1; for (auto e : g[v]) { if (e.to == par || dead[e.to]) continue; find(e.to, v, tmp, cs); ok &= (sz[e.to] <= tmp / 2); } ok &= (tmp - sz[v] <= tmp / 2); if (ok) cs.push_back(v); }; vector<ll> build(ll r) { ll tmp = szdfs(r, -1); vector<ll> cs; find(r, -1, tmp, cs); return cs; } inline ll get_sz(ll v) { return sz[v]; } inline void disable(ll v) { dead[v] = 1; } inline void enable(ll v) { dead[v] = 0; } inline ll alive(ll v) { return !dead[v]; } }; void solve(){ ll n,k; cin>>n>>k; Graph g(n); REP(i,n-1){ ll a,b,c; cin>>a>>b>>c; a--;b--; add_edge(g,a,b,c,true,c); } CentroidDecomposition cd(g); ll sum1=0, spre1=0; map<ll,ll> p1,pre1; map<pair<ll,ll>,ll> p2,pre2; map<ll,ll> p21,pre21; auto init =[&](){ sum1=0; p1.clear(); p2.clear(); p21.clear(); }; auto initpre = [&](){ spre1=0; pre1.clear(); pre2.clear(); pre21.clear(); }; auto dfs = [&](auto &&self, int v, int p, int c1,int c2)->void{ if(c1&&c2){ if(c1>c2) swap(c1,c2); p2[{c1,c2}]++; p21[c1]++; p21[c2]++; }else if(c1){ p1[c1]++; sum1++; } for(auto e:g[v]){ if(e.to==p || !cd.alive(e.to)) continue; if(c1&&c2){ if(e.cap == c1 || e.cap==c2) self(self,e.to,v,c1,c2); }else if(c1){ if(e.cap == c1) self(self,e.to,v,c1,c2); else self(self,e.to,v,c1,e.cap); } } }; queue<int> que; que.push(0); ll ans=0; while(que.size()){ int v=que.front();que.pop(); int r=cd.build(v)[0];//重心 cd.disable(r); initpre(); for(auto e:g[r]){ if(cd.alive(e.to)){ que.push(e.to); init(); dfs(dfs, e.to, r, e.cap, 0); //count for(auto i:p1){ ans+=(spre1-pre1[i.first])*i.second; ans+=(pre21[i.first])*i.second; } for(auto i:p2){ ans+=i.second; ans+=pre2[i.first]*i.second; ans+=pre1[i.first.first]*i.second; ans+=pre1[i.first.second]*i.second; } //add spre1+=sum1; for(auto i:p1){ //cout<<i.first<<" "<<i.second<<en; pre1[i.first]+=i.second; } for(auto i:p2){ //cout<<"{"<<i.first.first<<","<<i.first.second<<"} "<<i.second<<en; pre2[i.first]+=i.second; } for(auto i:p21){ pre21[i.first]+=i.second; } } } //cout<<r<<" "<<ans<<en; //cout<<en; } cout<<ans<<en; } int main() { ios::sync_with_stdio(false); cin.tie(0); cout.tie(0); solve(); //ll t;cin>>t;REP(i,t) solve(); return 0; }