結果
問題 | No.1002 Twotone |
ユーザー | risujiroh |
提出日時 | 2020-03-02 10:07:52 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 1,014 ms / 5,000 ms |
コード長 | 3,834 bytes |
コンパイル時間 | 2,072 ms |
コンパイル使用メモリ | 194,844 KB |
実行使用メモリ | 45,308 KB |
最終ジャッジ日時 | 2024-10-13 20:56:54 |
合計ジャッジ時間 | 14,971 ms |
ジャッジサーバーID (参考情報) |
judge4 / 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 | AC | 1 ms
6,820 KB |
testcase_01 | AC | 2 ms
6,820 KB |
testcase_02 | AC | 2 ms
6,824 KB |
testcase_03 | AC | 293 ms
21,556 KB |
testcase_04 | AC | 422 ms
27,116 KB |
testcase_05 | AC | 422 ms
27,120 KB |
testcase_06 | AC | 2 ms
6,816 KB |
testcase_07 | AC | 240 ms
19,392 KB |
testcase_08 | AC | 445 ms
29,208 KB |
testcase_09 | AC | 443 ms
29,208 KB |
testcase_10 | AC | 2 ms
6,820 KB |
testcase_11 | AC | 437 ms
22,608 KB |
testcase_12 | AC | 629 ms
27,872 KB |
testcase_13 | AC | 608 ms
28,012 KB |
testcase_14 | AC | 2 ms
6,816 KB |
testcase_15 | AC | 353 ms
18,404 KB |
testcase_16 | AC | 765 ms
30,440 KB |
testcase_17 | AC | 688 ms
29,676 KB |
testcase_18 | AC | 2 ms
6,816 KB |
testcase_19 | AC | 464 ms
32,820 KB |
testcase_20 | AC | 573 ms
45,308 KB |
testcase_21 | AC | 613 ms
44,420 KB |
testcase_22 | AC | 2 ms
6,816 KB |
testcase_23 | AC | 515 ms
28,100 KB |
testcase_24 | AC | 1,001 ms
45,016 KB |
testcase_25 | AC | 1,014 ms
42,888 KB |
testcase_26 | AC | 2 ms
6,816 KB |
testcase_27 | AC | 94 ms
21,288 KB |
testcase_28 | AC | 174 ms
29,736 KB |
testcase_29 | AC | 151 ms
29,708 KB |
testcase_30 | AC | 2 ms
6,816 KB |
testcase_31 | AC | 146 ms
29,540 KB |
testcase_32 | AC | 187 ms
29,708 KB |
testcase_33 | AC | 154 ms
29,836 KB |
testcase_34 | AC | 503 ms
41,476 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; template <class It> auto rle(It first, It last) { vector<pair<decltype(*first), int>> res; for (; first != last; ++first) { if (res.empty() or res.back().first != *first) { res.emplace_back(*first, 1); } else { ++res.back().second; } } return res; } int main() { cin.tie(nullptr); ios::sync_with_stdio(false); int n, k; cin >> n >> k; vector<vector<int>> g(n), col(n); for (int _ = n - 1; _--; ) { int u, v, c; cin >> u >> v >> c; --u, --v; g[u].push_back(v), col[u].push_back(c); g[v].push_back(u), col[v].push_back(c); } vector<bool> be(n, true); vector<int> sz(n), par(n); auto centroids = [&](int r, int cur_n) { vector<int> res; auto dfs = [&](auto&& self, int v, int p) -> void { sz[v] = 1, par[v] = p; bool ok = true; for (int u : g[v]) { if (be[u] and u != p) { self(self, u, v); sz[v] += sz[u]; ok &= 2 * sz[u] <= cur_n; } } if (ok and 2 * sz[v] >= cur_n) { res.push_back(v); } }; dfs(dfs, r, -1); return res; }; vector<int> c1; vector<pair<int, int>> c2; auto dfs = [&](auto&& self, int v, int p, const vector<int>& cs) -> void { if (cs.size() == 1) { c1.push_back(cs[0]); } else { c2.emplace_back(cs[0], cs[1]); } for (int id = 0; id < (int)g[v].size(); ++id) { int u = g[v][id], c = col[v][id]; if (be[u] and u != p) { if (cs.size() == 1) { if (c < cs[0]) { self(self, u, v, {c, cs[0]}); } else if (cs[0] < c) { self(self, u, v, {cs[0], c}); } else { self(self, u, v, cs); } } else if (c == cs[0] or c == cs[1]) { self(self, u, v, cs); } } } }; auto f11 = [&](int s, int t) { auto res = (long long)(t - s) * (t - s); for (auto e : rle(begin(c1) + s, begin(c1) + t)) { res -= (long long)e.second * e.second; } return res /= 2; }; auto f12 = [&](int s1, int t1, int s2, int t2) { vector<int> cs(2 * (t2 - s2)); for (int i = 0; i < (int)cs.size(); i += 2) { tie(cs[i], cs[i + 1]) = c2[s2 + i / 2]; } sort(begin(cs), end(cs)); auto v1 = rle(begin(c1) + s1, begin(c1) + t1); auto v2 = rle(begin(cs), end(cs)); long long res = 0; for (int i1 = 0, i2 = 0; i1 < (int)v1.size() and i2 < (int)v2.size(); ) { if (v1[i1].first == v2[i2].first) { res += (long long)v1[i1].second * v2[i2].second; ++i1, ++i2; } else { if (v1[i1].first < v2[i2].first) { ++i1; } else { ++i2; } } } return res; }; auto f22 = [&](int s, int t) { long long res = 0; for (auto e : rle(begin(c2) + s, begin(c2) + t)) { res += (long long)e.second * (e.second - 1) / 2; } return res; }; long long res = 0; auto rec = [&](auto&& self, int c, int cur_n) -> void { c = centroids(c, cur_n)[0]; be[c] = false; for (int v : g[c]) { if (be[v]) { self(self, v, par[v] == c ? sz[v] : cur_n - sz[c]); } } be[c] = true; c1.clear(), c2.clear(); for (int id = 0; id < (int)g[c].size(); ++id) { int v = g[c][id]; if (be[v]) { int n1 = c1.size(), n2 = c2.size(); dfs(dfs, v, c, {col[c][id]}); sort(begin(c1) + n1, end(c1)); sort(begin(c2) + n2, end(c2)); res -= f12(n1, c1.size(), n2, c2.size()); res -= f22(n2, c2.size()); } } sort(begin(c1), end(c1)); sort(begin(c2), end(c2)); int n1 = c1.size(), n2 = c2.size(); res += c2.size(); res += f11(0, n1); res += f12(0, n1, 0, n2); res += f22(0, n2); }; rec(rec, 0, n); cout << res << '\n'; }