結果
問題 | No.2277 Honest or Dishonest ? |
ユーザー | magsta |
提出日時 | 2023-04-20 09:31:48 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 231 ms / 2,000 ms |
コード長 | 5,194 bytes |
コンパイル時間 | 1,070 ms |
コンパイル使用メモリ | 73,460 KB |
実行使用メモリ | 20,736 KB |
最終ジャッジ日時 | 2024-11-08 06:20:13 |
合計ジャッジ時間 | 9,380 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 50 |
ソースコード
#include <iostream> #include <vector> using namespace std; using Graph = vector<vector<int>>; // 深さ優先探索 int seen[100010], seen2[100010]; bool dfs(const Graph &G, const Graph &G_, const Graph &G2, const Graph &G2_, int v, bool HonLia) { bool flag = false; //矛盾が生じたか if (HonLia == true) seen[v] = 2; else seen[v] = 1; for (auto next_v : G[v]) { if (seen[next_v] >= 1){ if (HonLia == true && seen[next_v] == 1) flag = true; if (HonLia == false && seen[next_v] == 2) flag = true; continue; } if (HonLia == true) {if (dfs(G, G_, G2, G2_, next_v, true) == true) flag = true;} // 再帰的に探索 else {if (dfs(G, G_, G2, G2_, next_v, false) == true) flag = true;} // 再帰的に探索 } for (auto next_v : G_[v]) { if (seen[next_v] >= 1){ if (HonLia == true && seen[next_v] == 2) flag = true; if (HonLia == false && seen[next_v] == 1) flag = true; continue; } if (HonLia == true) {if (dfs(G, G_, G2, G2_, next_v, false) == true) flag = true;} // 再帰的に探索 else {if (dfs(G, G_, G2, G2_, next_v, true) == true) flag = true;} // 再帰的に探索 } for (auto next_v : G2[v]) { if (seen[next_v] >= 1){ if (HonLia == true && seen[next_v] == 1) flag = true; if (HonLia == false && seen[next_v] == 2) flag = true; continue; } if (HonLia == true) {if (dfs(G, G_, G2, G2_, next_v, true) == true) flag = true;} // 再帰的に探索 else {if (dfs(G, G_, G2, G2_, next_v, false) == true) flag = true;} // 再帰的に探索 } for (auto next_v : G2_[v]) { if (seen[next_v] >= 1){ if (HonLia == true && seen[next_v] == 2) flag = true; if (HonLia == false && seen[next_v] == 1) flag = true; continue; } if (HonLia == true) {if (dfs(G, G_, G2, G2_, next_v, false) == true) flag = true;} // 再帰的に探索 else {if (dfs(G, G_, G2, G2_, next_v, true) == true) flag = true;} // 再帰的に探索 } return flag; } bool dfs2(const Graph &G, const Graph &G_, const Graph &G2, const Graph &G2_, int v, bool HonLia) { bool flag = false; //矛盾が生じたか if (HonLia == true) seen2[v] = 2; else seen2[v] = 1; for (auto next_v : G[v]) { if (seen2[next_v] >= 1){ if (HonLia == true && seen2[next_v] == 1) flag = true; if (HonLia == false && seen2[next_v] == 2) flag = true; continue; } if (HonLia == true) {if (dfs2(G, G_, G2, G2_, next_v, true) == true) flag = true;} // 再帰的に探索 else {if (dfs2(G, G_, G2, G2_, next_v, false) == true) flag = true;} // 再帰的に探索 } for (auto next_v : G_[v]) { if (seen2[next_v] >= 1){ if (HonLia == true && seen2[next_v] == 2) flag = true; if (HonLia == false && seen2[next_v] == 1) flag = true; continue; } if (HonLia == true) {if (dfs2(G, G_, G2, G2_, next_v, false) == true) flag = true;} // 再帰的に探索 else {if (dfs2(G, G_, G2, G2_, next_v, true) == true) flag = true;} // 再帰的に探索 } for (auto next_v : G2[v]) { if (seen2[next_v] >= 1){ if (HonLia == true && seen2[next_v] == 1) flag = true; if (HonLia == false && seen2[next_v] == 2) flag = true; continue; } if (HonLia == true) {if (dfs2(G, G_, G2, G2_, next_v, true) == true) flag = true;} // 再帰的に探索 else {if (dfs2(G, G_, G2, G2_, next_v, false) == true) flag = true;} // 再帰的に探索 } for (auto next_v : G2_[v]) { if (seen2[next_v] >= 1){ if (HonLia == true && seen2[next_v] == 2) flag = true; if (HonLia == false && seen2[next_v] == 1) flag = true; continue; } if (HonLia == true) {if (dfs2(G, G_, G2, G2_, next_v, false) == true) flag = true;} // 再帰的に探索 else {if (dfs2(G, G_, G2, G2_, next_v, true) == true) flag = true;} // 再帰的に探索 } return flag; } int main() { // 頂点数と辺数 int N, Q; cin >> N >> Q; // グラフ入力受取 Graph G(N), G_(N), G2(N), G2_(N); for (int i = 0; i < Q; ++i) { int a, b, c; cin >> a >> b >> c; if (c == 0) G[a - 1].push_back(b - 1); if (c == 1) G_[a - 1].push_back(b - 1); if (c == 0) G2[b - 1].push_back(a - 1); if (c == 1) G2_[b - 1].push_back(a - 1); } // 全頂点が訪問済みになるまで探索 long long ans = 1; for (int i = 0; i < N; i++) seen[i] = seen2[i] = 0; for (int v = 0; v < N; ++v) { if (seen[v] >= 1) continue; // v が探索済みだったらスルー long long count = 0; if (dfs(G, G_, G2, G2_, v, true) == false) count++; // v が未探索なら v を始点とした DFS を行う if (dfs2(G, G_, G2, G2_, v, false) == false) count++; // v が未探索なら v を始点とした DFS を行う ans = (ans * count) % 998244353; } cout << ans << endl; }