結果
問題 | No.1002 Twotone |
ユーザー | square1001 |
提出日時 | 2020-03-01 21:02:29 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 372 ms / 5,000 ms |
コード長 | 5,574 bytes |
コンパイル時間 | 1,813 ms |
コンパイル使用メモリ | 146,220 KB |
実行使用メモリ | 78,780 KB |
最終ジャッジ日時 | 2024-10-13 20:52:41 |
合計ジャッジ時間 | 9,658 ms |
ジャッジサーバーID (参考情報) |
judge4 / 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 | 2 ms
6,820 KB |
testcase_01 | AC | 1 ms
6,820 KB |
testcase_02 | AC | 2 ms
6,816 KB |
testcase_03 | AC | 262 ms
51,888 KB |
testcase_04 | AC | 331 ms
66,444 KB |
testcase_05 | AC | 339 ms
66,536 KB |
testcase_06 | AC | 2 ms
6,820 KB |
testcase_07 | AC | 139 ms
40,196 KB |
testcase_08 | AC | 238 ms
64,056 KB |
testcase_09 | AC | 239 ms
64,052 KB |
testcase_10 | AC | 2 ms
6,816 KB |
testcase_11 | AC | 209 ms
49,860 KB |
testcase_12 | AC | 265 ms
63,736 KB |
testcase_13 | AC | 274 ms
63,840 KB |
testcase_14 | AC | 2 ms
6,816 KB |
testcase_15 | AC | 143 ms
38,108 KB |
testcase_16 | AC | 264 ms
63,744 KB |
testcase_17 | AC | 292 ms
63,952 KB |
testcase_18 | AC | 2 ms
6,816 KB |
testcase_19 | AC | 195 ms
55,256 KB |
testcase_20 | AC | 245 ms
72,512 KB |
testcase_21 | AC | 225 ms
71,496 KB |
testcase_22 | AC | 2 ms
6,820 KB |
testcase_23 | AC | 125 ms
41,876 KB |
testcase_24 | AC | 238 ms
67,668 KB |
testcase_25 | AC | 243 ms
64,272 KB |
testcase_26 | AC | 2 ms
6,816 KB |
testcase_27 | AC | 168 ms
52,948 KB |
testcase_28 | AC | 354 ms
77,772 KB |
testcase_29 | AC | 283 ms
77,888 KB |
testcase_30 | AC | 2 ms
6,816 KB |
testcase_31 | AC | 275 ms
77,236 KB |
testcase_32 | AC | 372 ms
77,528 KB |
testcase_33 | AC | 276 ms
77,708 KB |
testcase_34 | AC | 201 ms
78,780 KB |
ソースコード
#include <vector> #include <iostream> #include <algorithm> #include <functional> #include <unordered_map> using namespace std; class edge { public: int to, col; edge() : to(-1), col(-1) {}; edge(int to_, int col_) : to(to_), col(col_) {}; }; inline long long hashing(long long a, long long b) { return ((long long)(a) << 32) + b; } long long solve(int N, vector<vector<edge> > G) { vector<vector<edge> > child(N); vector<edge> par(N); vector<int> ord; function<void(int, int)> make_order = [&](int pos, int pre) { for (edge e : G[pos]) { if (e.to == pre) continue; par[e.to] = edge(pos, e.col); child[pos].push_back(e); make_order(e.to, pos); } ord.push_back(pos); }; make_order(0, -1); vector<int> group(N, -1); vector<unordered_map<int, int> > d(N); vector<int> dsum(N); long long ans = 0; for (int i : ord) { sort(child[i].begin(), child[i].end(), [&](edge& e1, edge& e2) { return d[group[e1.to]].size() > d[group[e2.to]].size(); }); group[i] = (child[i].empty() ? i : group[child[i][0].to]); unordered_map<long long, int> s; unordered_map<int, int> subs; for (int j = 0; j < child[i].size(); ++j) { edge e = child[i][j]; ans += dsum[group[e.to]] - d[group[e.to]][-1]; if (j >= 1) { for (pair<int, int> k : d[group[e.to]]) { int va = k.first, vb = e.col; if (va > vb) swap(va, vb); if (va == vb) va = -1; if (va != -1) { if (s.find(hashing(va, vb)) != s.end()) { ans += 1LL * s[hashing(va, vb)] * k.second; } if (s.find(hashing(-1, va)) != s.end()) { ans += 1LL * s[hashing(-1, va)] * k.second; } if (s.find(hashing(-1, vb)) != s.end()) { ans += 1LL * s[hashing(-1, vb)] * k.second; } } else { if (subs.find(-1) != subs.end()) { ans += 1LL * subs[-1] * k.second; } if (subs.find(vb) != subs.end()) { ans += 1LL * subs[vb] * k.second; } if (s.find(hashing(-1, vb)) != s.end()) { ans -= 2LL * s[hashing(-1, vb)] * k.second; } } } for (pair<int, int> k : d[group[e.to]]) { int va = k.first, vb = e.col; if (va > vb) swap(va, vb); if (va == vb) va = -1; s[hashing(va, vb)] += k.second; subs[va] += k.second; subs[vb] += k.second; } } } int mcol = (child[i].empty() ? -1 : child[i][0].col); for (pair<long long, int> j : s) { int va = (j.first >> 32), vb = j.first - ((long long)(va) << 32); if (va == mcol) va = -1; if (vb == mcol) vb = -1; if (va > vb) swap(va, vb); if (vb == -1) { ans += 1LL * (dsum[group[i]] - d[group[i]][-1]) * j.second; } else if (va == -1) { if (d[group[i]].find(vb) != d[group[i]].end()) { ans += 1LL * d[group[i]][vb] * j.second; } ans += 1LL * d[group[i]][-1] * j.second; } } int pcol = par[i].col; if (mcol != pcol && mcol != -1) { int val = 0, valp = 0; for (pair<int, int> j : d[group[i]]) { if (j.first == -1) { val = j.second; } else if (j.first == pcol) { valp = j.second; } else { dsum[group[i]] -= j.second; } } d[group[i]].clear(); d[group[i]][mcol] += val + valp; } for (int j = 1; j < child[i].size(); ++j) { int col = child[i][j].col; for (pair<int, int> k : d[group[child[i][j].to]]) { int va = col, vb = k.first; if (va == pcol) va = -1; if (vb == pcol) vb = -1; if (va > vb) swap(va, vb); if (va == vb) va = -1; if (va != -1) continue; dsum[group[i]] += k.second; d[group[i]][vb] += k.second; } } dsum[group[i]] += 1; d[group[i]][-1] += 1; } return ans; } #include <set> long long solve_easy(int N, vector<vector<edge> > G) { long long ans = 0; for (int i = 0; i < N; ++i) { for (int j = 0; j < i; ++j) { set<int> s; function<bool(int, int)> dfs = [&](int pos, int pre) { if (pos == i) return true; bool ok = false; for (edge e : G[pos]) { if (e.to == pre) continue; bool res = dfs(e.to, pos); if (res) { s.insert(e.col); ok = true; } } return ok; }; dfs(j, -1); if (s.size() == 2) { ++ans; } } } return ans; } #include <random> #include <string> mt19937 mt(2003012025); int rand_rng(int l, int r) { uniform_int_distribution<int> p(l, r - 1); return p(mt); } string to_string(vector<int> arr) { int n = arr.size(); string ans = "["; for (int i = 0; i < n; ++i) { if (i) ans += ", "; ans += to_string(arr[i]); } ans += "]"; return ans; } void random_gen() { const int samples = 10000; int N = 7, K = 3; for (int i = 1; i <= samples; ++i) { vector<vector<edge> > G(N); vector<int> parseq(N, -1), colseq(N, -1); for (int j = 1; j < N; ++j) { int par = rand_rng(0, j), col = rand_rng(0, K); G[j].push_back(edge(par, col)); G[par].push_back(edge(j, col)); parseq[j] = par; colseq[j] = col; } long long res1 = solve(N, G); long long res2 = solve_easy(N, G); if (res1 != res2) { cout << "Case #" << i << " / N = " << N << endl; cout << "par = " << to_string(parseq) << endl; cout << "col = " << to_string(colseq) << endl; cout << "Returns: " << res1 << endl; cout << "Answer: " << res2 << endl; cout << endl; } } } int main() { // random_gen(); cin.tie(0); ios_base::sync_with_stdio(false); int N, K; cin >> N >> K; vector<vector<edge> > G(N); for (int i = 0; i < N - 1; ++i) { int a, b, col; cin >> a >> b >> col; --a, --b, --col; G[a].push_back(edge(b, col)); G[b].push_back(edge(a, col)); } long long ans = solve(N, G); cout << ans << endl; return 0; }