結果
問題 | No.768 Tapris and Noel play the game on Treeone |
ユーザー | sash0 |
提出日時 | 2021-11-06 14:08:10 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 106 ms / 2,000 ms |
コード長 | 4,305 bytes |
コンパイル時間 | 3,602 ms |
コンパイル使用メモリ | 235,184 KB |
実行使用メモリ | 16,556 KB |
最終ジャッジ日時 | 2024-11-07 10:30:47 |
合計ジャッジ時間 | 7,464 ms |
ジャッジサーバーID (参考情報) |
judge2 / 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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 3 ms
5,248 KB |
testcase_04 | AC | 3 ms
5,248 KB |
testcase_05 | AC | 3 ms
5,248 KB |
testcase_06 | AC | 3 ms
5,248 KB |
testcase_07 | AC | 58 ms
11,264 KB |
testcase_08 | AC | 26 ms
7,424 KB |
testcase_09 | AC | 34 ms
8,192 KB |
testcase_10 | AC | 23 ms
7,040 KB |
testcase_11 | AC | 101 ms
15,488 KB |
testcase_12 | AC | 97 ms
15,744 KB |
testcase_13 | AC | 100 ms
15,360 KB |
testcase_14 | AC | 92 ms
15,360 KB |
testcase_15 | AC | 106 ms
16,128 KB |
testcase_16 | AC | 103 ms
16,128 KB |
testcase_17 | AC | 106 ms
16,384 KB |
testcase_18 | AC | 90 ms
16,540 KB |
testcase_19 | AC | 87 ms
16,556 KB |
testcase_20 | AC | 95 ms
16,128 KB |
testcase_21 | AC | 90 ms
15,488 KB |
20evil_special_uni1.txt | AC | 105 ms
16,384 KB |
20evil_special_uni2.txt | AC | 97 ms
15,488 KB |
ソースコード
// clang-format off #include <bits/stdc++.h> #include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> #define mp make_pair #define fst first #define snd second #define forn(i,n) for (int i = 0; i < int(n); i++) #define forn1(i,n) for (int i = 1; i <= int(n); i++) #define popcnt __builtin_popcountll #define ffs __builtin_ffsll #define ctz __builtin_ctzll #define clz __builtin_clz #define clzll __builtin_clzll #define all(a) (a).begin(), (a).end() using namespace std; using namespace __gnu_pbds; using uint = unsigned int; using ll = long long; using ull = unsigned long long; using pii = pair<int,int>; using pli = pair<ll,int>; using pil = pair<int,ll>; using pll = pair<ll,ll>; template <typename T> using vec = vector<T>; using vi = vec<int>; using vl = vec<ll>; template <typename T> using que = queue<T>; template <typename T> using deq = deque<T>; template <typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>; template <typename K, typename V> using ordered_map = tree<K, V, less<K>, rb_tree_tag, tree_order_statistics_node_update>; template <typename T> T id(T b) {return b;}; template <typename T> void chmax(T &x, T y) {if (x < y) x = y;} template <typename T> void chmin(T &x, T y) {if (x > y) x = y;} template <typename S, typename K> bool contains(S &s, K k) { return s.find(k) != s.end(); } template <typename T> bool getf(T flag, size_t i) { return (flag>>i) & 1; } template <typename T> T setf(T flag, size_t i) { return flag | (T(1)<<i); } template <typename T> T unsetf(T flag, size_t i) { return flag & ~(T(1)<<i); } void fastio() { ios_base::sync_with_stdio(false); cin.tie(nullptr); } constexpr ll TEN(int n) { if (n == 0) return 1LL; else return 10LL*TEN(n-1); } // clang-format on namespace aclext { template <typename S, typename M, typename R, typename C, M (*merge)(M, M, int), M (*introduce)(M, S, C, int, int), M (*em)(), R (*result)(M, int), S (*subtree)(M, int)> class Rerooting { int n; vector<vector<pair<int, C>>> g; vector<R> ans; vector<vector<S>> dp; S dfs1(int u, int p) { M s = em(); int k = g[u].size(); dp[u] = vector<S>(k); for (int i = 0; i < k; i++) { auto [v, c] = g[u][i]; if (v == p) continue; dp[u][i] = dfs1(v, u); s = introduce(s, dp[u][i], c, u, v); } return subtree(s, u); } void dfs2(int u, S par, int p) { int k = g[u].size(); for (int i = 0; i < k; i++) { auto [v, c] = g[u][i]; if (v == p) { dp[u][i] = par; } } vector<M> dp_l(k + 1, em()), dp_r(k + 1, em()); for (int i = 0; i < k; i++) { dp_l[i + 1] = introduce(dp_l[i], dp[u][i], g[u][i].second, u, g[u][i].first); } ans[u] = result(dp_l[k], u); for (int i = k - 1; i >= 0; i--) { dp_r[i] = introduce(dp_r[i + 1], dp[u][i], g[u][i].second, u, g[u][i].first); } for (int i = 0; i < k; i++) { auto [v, c] = g[u][i]; if (v == p) continue; dfs2(v, subtree(merge(dp_l[i], dp_r[i + 1], u), u), u); } } public: Rerooting(int n) : n(n), g(n), ans(n) { } void add_edge(int u, int v, C c = {}) { assert(0 <= u && u < n); assert(0 <= v && v < n); g[u].emplace_back(v, c); g[v].emplace_back(u, c); } vector<R> calc() { dp = vector<vector<S>>(n); dfs1(0, -1); dfs2(0, {}, -1); return ans; } }; } using S = bool; using M = bool; using C = bool; using R = S; M merge(M a, M b, int) { return a and b; } M introduce(M a, S b, C c, int, int) { return a and !b; } M em() { return true; } R result(M a, int) { return a; } using rerooting = aclext::Rerooting<S, M, R, C, merge, introduce, em, result, result>; int main() { fastio(); int n; cin >> n; rerooting r(n); forn(i, n - 1) { int u, v; cin >> u >> v; u--, v--; r.add_edge(u, v); } auto ans = r.calc(); cout << count(all(ans), true) << "\n"; forn(i, n) { if (ans[i]) { cout << (i + 1) << "\n"; } } return 0; }