結果
問題 | No.1002 Twotone |
ユーザー | outline |
提出日時 | 2020-03-03 22:06:59 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 3,713 ms / 5,000 ms |
コード長 | 4,662 bytes |
コンパイル時間 | 1,683 ms |
コンパイル使用メモリ | 136,068 KB |
実行使用メモリ | 139,392 KB |
最終ジャッジ日時 | 2024-10-13 23:08:37 |
合計ジャッジ時間 | 22,768 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge4 |
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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 | 5 ms
8,064 KB |
testcase_01 | AC | 4 ms
8,192 KB |
testcase_02 | AC | 5 ms
8,064 KB |
testcase_03 | AC | 498 ms
14,848 KB |
testcase_04 | AC | 662 ms
16,896 KB |
testcase_05 | AC | 652 ms
16,896 KB |
testcase_06 | AC | 5 ms
7,936 KB |
testcase_07 | AC | 290 ms
13,184 KB |
testcase_08 | AC | 542 ms
16,512 KB |
testcase_09 | AC | 546 ms
16,512 KB |
testcase_10 | AC | 5 ms
8,064 KB |
testcase_11 | AC | 682 ms
16,768 KB |
testcase_12 | AC | 929 ms
18,944 KB |
testcase_13 | AC | 937 ms
19,072 KB |
testcase_14 | AC | 5 ms
8,192 KB |
testcase_15 | AC | 498 ms
13,312 KB |
testcase_16 | AC | 987 ms
17,280 KB |
testcase_17 | AC | 964 ms
17,280 KB |
testcase_18 | AC | 6 ms
8,192 KB |
testcase_19 | AC | 671 ms
23,808 KB |
testcase_20 | AC | 847 ms
33,920 KB |
testcase_21 | AC | 861 ms
33,152 KB |
testcase_22 | AC | 6 ms
8,064 KB |
testcase_23 | AC | 826 ms
36,992 KB |
testcase_24 | AC | 1,563 ms
54,528 KB |
testcase_25 | AC | 1,559 ms
54,400 KB |
testcase_26 | AC | 5 ms
8,064 KB |
testcase_27 | AC | 129 ms
44,364 KB |
testcase_28 | AC | 215 ms
54,112 KB |
testcase_29 | AC | 199 ms
54,156 KB |
testcase_30 | AC | 5 ms
8,064 KB |
testcase_31 | AC | 193 ms
53,800 KB |
testcase_32 | AC | 203 ms
53,844 KB |
testcase_33 | AC | 193 ms
53,836 KB |
testcase_34 | AC | 3,713 ms
139,392 KB |
ソースコード
// 参考文献 : http://kmjp.hatenablog.jp/entry/2020/02/29/0930 #include <iostream> #include <vector> #include <algorithm> #include <cmath> #include <queue> #include <string> #include <map> #include <set> #include <tuple> #include <deque> #include <numeric> #include <bitset> #include <iomanip> #include <cassert> #include <chrono> #include <random> #include <limits> #include <iterator> #include <functional> #include <sstream> #include <complex> using namespace std; typedef long long ll; typedef pair<int, int> P; typedef pair<int, double> Pid; typedef pair<double, int> Pdi; typedef pair<ll, int> Pl; typedef pair<int, pair<int, int>> PP; const double PI = 3.1415926535897932; // acos(-1) const double EPS = 1e-15; const int INF = 1001001001; const int mod = 1e+9 + 7; #define chmax(x, y) x = max(x, y) #define chmin(x, y) x = min(x, y) #define chadd(x, y) x = (x + y) % mod int n, k; vector<P> graph[200005]; // (to, color) bool used[200005]; // 分割点として使われたかどうか int subtree_size[200005]; // 部分木のサイズ // 部分木サイズの計算 void calc_subtreesize(int u, int parent = -1){ subtree_size[u] = 1; for(int i = 0; i < graph[u].size(); ++i){ int v = graph[u][i].first; if(v == parent || used[v]) continue; calc_subtreesize(v, u); subtree_size[u] += subtree_size[v]; } } // 重心を探索 (v が重心候補) // 返り値は (部分木の最大サイズ, 重心) のペア P search_centroid(int from, int sz, int parent = -1){ P res = P(INF, -1); int sum = 1, maxsz = 0; for(int i = 0; i < graph[from].size(); ++i){ int to = graph[from][i].first, color = graph[from][i].second; if(to == parent || used[to]) continue; chmin(res, search_centroid(to, sz, from)); chmax(maxsz, subtree_size[to]); sum += subtree_size[to]; } chmax(maxsz, sz - sum); chmin(res, P(maxsz, from)); return res; } ll ans = 0; void Count(int from, map<set<int>, ll> &cnt, set<int> table, int parent = -1){ ++cnt[table]; for(int i = 0; i < graph[from].size(); ++i){ int to = graph[from][i].first, color = graph[from][i].second; if(to == parent || used[to]) continue; set<int> table2 = table; table2.insert(color); if(table2.size() >= 3) continue; Count(to, cnt, table2, from); } } void solve(int from){ calc_subtreesize(from); if(subtree_size[from] == 1) return; P info = search_centroid(from, subtree_size[from]); int center = info.second; vector<map<set<int>, ll>> cnt; map<set<int>, ll> total; for(int i = 0; i < graph[center].size(); ++i){ int to = graph[center][i].first, color = graph[center][i].second; if(used[to]) continue; cnt.push_back({}); Count(to, cnt.back(), {color}, center); for(auto it : cnt.back()){ total[it.first] += it.second; } } ll onenum = 0, oneans = 0; map<set<int>, ll> twosum; for(auto it : total){ if(it.first.size() == 1){ onenum += it.second; oneans -= it.second * it.second; } else{ // it.first.size() == 2 twosum[it.first] += it.second * it.second; ans += it.second; for(auto it2 : it.first){ set<int> st = {it2}; auto ite = total.lower_bound(st); if((*ite).first == st){ ans += (*ite).second * it.second; } } } } for(auto it : cnt){ for(auto it2 : it){ if(it2.first.size() == 1) ; else{ twosum[it2.first] -= it2.second * it2.second; for(auto it3 : it2.first){ set<int> st = {it3}; auto ite = it.lower_bound(st); if((*ite).first == st){ ans -= (*ite).second * it2.second; } } } } } oneans += onenum * onenum; ans += oneans / 2; for(auto it : twosum){ ans += it.second / 2; } used[center] = true; for(int i = 0; i < graph[center].size(); ++i){ int to = graph[center][i].first; if(used[to]) continue; solve(to); } } int main(){ ios::sync_with_stdio(false); cin.tie(nullptr); cin >> n >> k; for(int i = 0; i < n - 1; ++i){ int u, v, c; cin >> u >> v >> c; graph[--u].push_back(P(--v, c)); graph[v].push_back(P(u, c)); } solve(0); cout << ans << endl; }