結果
問題 | No.1955 Not Prime |
ユーザー | RVindicatio |
提出日時 | 2022-05-22 22:20:26 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 80 ms / 2,000 ms |
コード長 | 4,830 bytes |
コンパイル時間 | 4,085 ms |
コンパイル使用メモリ | 240,840 KB |
実行使用メモリ | 5,860 KB |
最終ジャッジ日時 | 2024-09-20 12:56:06 |
合計ジャッジ時間 | 5,679 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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 | 8 ms
5,248 KB |
testcase_01 | AC | 8 ms
5,248 KB |
testcase_02 | AC | 8 ms
5,376 KB |
testcase_03 | AC | 8 ms
5,376 KB |
testcase_04 | AC | 8 ms
5,376 KB |
testcase_05 | AC | 8 ms
5,376 KB |
testcase_06 | AC | 11 ms
5,376 KB |
testcase_07 | AC | 11 ms
5,376 KB |
testcase_08 | AC | 10 ms
5,376 KB |
testcase_09 | AC | 79 ms
5,376 KB |
testcase_10 | AC | 80 ms
5,376 KB |
testcase_11 | AC | 8 ms
5,376 KB |
testcase_12 | AC | 28 ms
5,376 KB |
testcase_13 | AC | 80 ms
5,376 KB |
testcase_14 | AC | 20 ms
5,376 KB |
testcase_15 | AC | 20 ms
5,376 KB |
testcase_16 | AC | 36 ms
5,376 KB |
testcase_17 | AC | 66 ms
5,860 KB |
testcase_18 | AC | 80 ms
5,376 KB |
testcase_19 | AC | 80 ms
5,608 KB |
testcase_20 | AC | 8 ms
5,376 KB |
testcase_21 | AC | 30 ms
5,376 KB |
testcase_22 | AC | 9 ms
5,376 KB |
testcase_23 | AC | 8 ms
5,376 KB |
testcase_24 | AC | 8 ms
5,376 KB |
testcase_25 | AC | 8 ms
5,376 KB |
ソースコード
#pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include<bits/stdc++.h> using namespace std; using ll = long long; const int INF = 1e9; const ll inf = 1LL<<60; namespace internal { template <class E> struct csr { std::vector<int> start; std::vector<E> elist; csr(int n, const std::vector<std::pair<int, E>>& edges) : start(n + 1), elist(edges.size()) { for (auto e : edges) { start[e.first + 1]++; } for (int i = 1; i <= n; i++) { start[i] += start[i - 1]; } auto counter = start; for (auto e : edges) { elist[counter[e.first]++] = e.second; } } }; // Reference: // R. Tarjan, // Depth-First Search and Linear Graph Algorithms struct scc_graph { public: scc_graph(int n) : _n(n) {} int num_vertices() { return _n; } void add_edge(int from, int to) { edges.push_back({from, {to}}); } // @return pair of (# of scc, scc id) std::pair<int, std::vector<int>> scc_ids() { auto g = csr<edge>(_n, edges); int now_ord = 0, group_num = 0; std::vector<int> visited, low(_n), ord(_n, -1), ids(_n); visited.reserve(_n); auto dfs = [&](auto self, int v) -> void { low[v] = ord[v] = now_ord++; visited.push_back(v); for (int i = g.start[v]; i < g.start[v + 1]; i++) { auto to = g.elist[i].to; if (ord[to] == -1) { self(self, to); low[v] = std::min(low[v], low[to]); } else { low[v] = std::min(low[v], ord[to]); } } if (low[v] == ord[v]) { while (true) { int u = visited.back(); visited.pop_back(); ord[u] = _n; ids[u] = group_num; if (u == v) break; } group_num++; } }; for (int i = 0; i < _n; i++) { if (ord[i] == -1) dfs(dfs, i); } for (auto& x : ids) { x = group_num - 1 - x; } return {group_num, ids}; } std::vector<std::vector<int>> scc() { auto ids = scc_ids(); int group_num = ids.first; std::vector<int> counts(group_num); for (auto x : ids.second) counts[x]++; std::vector<std::vector<int>> groups(ids.first); for (int i = 0; i < group_num; i++) { groups[i].reserve(counts[i]); } for (int i = 0; i < _n; i++) { groups[ids.second[i]].push_back(i); } return groups; } private: int _n; struct edge { int to; }; std::vector<std::pair<int, edge>> edges; }; } // namespace internal struct two_sat { public: two_sat() : _n(0), scc(0) {} two_sat(int n) : _n(n), _answer(n), scc(2 * n) {} void add_clause(int i, bool f, int j, bool g) { assert(0 <= i && i < _n); assert(0 <= j && j < _n); scc.add_edge(2 * i + (f ? 0 : 1), 2 * j + (g ? 1 : 0)); scc.add_edge(2 * j + (g ? 0 : 1), 2 * i + (f ? 1 : 0)); } bool satisfiable() { auto id = scc.scc_ids().second; for (int i = 0; i < _n; i++) { if (id[2 * i] == id[2 * i + 1]) return false; _answer[i] = id[2 * i] < id[2 * i + 1]; } return true; } std::vector<bool> answer() { return _answer; } private: int _n; std::vector<bool> _answer; internal::scc_graph scc; }; void solve() { vector<bool> era(1000100, true); era[0] = era[1] = true; for (int i=2; i<1000100; i++) if (era[i]) { for (int x=2*i; x<1000100; x+=i) era[x] = false; } auto check = [&](int x, int y) -> bool { string s = to_string(x) + to_string(y); return era[stoi(s)]; }; int n; cin >> n; two_sat ts(n); vector<int> a(n), b(n); for (int i=0; i<n; i++) cin >> a[i] >> b[i]; for (int i=0; i<n; i++) { if (check(a[i], b[i]) && check(b[i], a[i])) { cout << "No" << '\n'; return; } if (!check(a[i], b[i]) && check(b[i], a[i])) ts.add_clause(i, 0, i, 0); if (!check(b[i], a[i]) && check(a[i], b[i])) ts.add_clause(i, 1, i, 1); for (int j=i+1; j<n; j++) { if (check(a[i], b[j]) || check(a[j], b[i])) ts.add_clause(i, 1, j, 1); if (check(a[i], a[j]) || check(b[j], b[i])) ts.add_clause(i, 1, j, 0); if (check(b[i], b[j]) || check(a[j], a[i])) ts.add_clause(i, 0, j, 1); if (check(b[i], a[j]) || check(b[j], a[i])) ts.add_clause(i, 0, j, 0); } } cout << (ts.satisfiable() ? "Yes" : "No") << '\n'; } int main() { ios::sync_with_stdio(false); std::cin.tie(nullptr); // int t; cin >> t; /*while (t--)*/ solve(); }