結果
問題 | No.241 出席番号(1) |
ユーザー |
![]() |
提出日時 | 2018-09-25 22:52:42 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 3 ms / 2,000 ms |
コード長 | 3,172 bytes |
コンパイル時間 | 1,817 ms |
コンパイル使用メモリ | 175,952 KB |
実行使用メモリ | 5,248 KB |
最終ジャッジ日時 | 2024-11-30 22:21:28 |
合計ジャッジ時間 | 3,118 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 29 |
ソースコード
#include "bits/stdc++.h"using namespace std;typedef long long ll;typedef pair<int, int> pii;typedef pair<ll, ll> pll;const int INF = 1e9;const ll LINF = 1e18;template<class S,class T> ostream& operator << (ostream& out,const pair<S,T>& o){ out << "(" << o.first << "," << o.second << ")"; return out; }template<class T> ostream& operator << (ostream& out,const vector<T> V){ for(int i = 0; i < V.size(); i++){ out << V[i]; if(i!=V.size()-1) out << " ";} return out; }template<class T> ostream& operator << (ostream& out,const vector<vector<T> > Mat){ for(int i = 0; i < Mat.size(); i++) { if(i != 0) out << endl; out<< Mat[i];} return out; }template<class S,class T> ostream& operator << (ostream& out,const map<S,T> mp){ out << "{ "; for(auto it = mp.begin(); it != mp.end(); it++){ out <<it->first << ":" << it->second; if(mp.size()-1 != distance(mp.begin(),it)) out << ", "; } out << " }"; return out; }/*<url:https://yukicoder.me/problems/no/241>問題文=============================================================================================================================解説=============================================================================================================================*/struct edge {int to; // 行き先int cap; // 容量int rev; // 逆辺edge() {}edge(int to, int cap, int rev) :to(to), cap(cap), rev(rev) {}};vector<vector<edge>> G; // グラフの隣接リスト表現vector<int> used; // DFSですでに調べたらフラグ// fromからtoへ向かう容量capの辺をグラフに追加するvoid add_edge(int from, int to, int cap) {G[from].push_back(edge(to, cap, G[to].size()));G[to].push_back(edge(from, 0, G[from].size() - 1));}// 増加パスをDFSで探すint dfs(int v, int t, int f) {if (v == t) return f;used[v] = true;for (int i = 0; i < G[v].size(); i++) {edge &e = G[v][i];if (!used[e.to] && e.cap > 0) {int d = dfs(e.to, t, min(f, e.cap));if (d > 0) {e.cap -= d;G[e.to][e.rev].cap += d;return d;}}}return 0;}// sからtへの最大流を求めるint max_flow(int s, int t) {int flow = 0;for (;;) {fill(used.begin(), used.end(), 0);int f = dfs(s, t, INF);if (f == 0) return flow;flow += f;}}void solve(){int N; cin >> N;vector<int> A(N); for(auto& in:A) cin >> in;int S = 2*N,T = S+1;G.resize(2*N+2); used.resize(2*N+2);for(int i = 0; i < N;i++){add_edge(S, i, 1);add_edge(i+N, T, 1);for(int j = 0; j < N;j++){if(A[i] == j) continue;add_edge(i,j+N,1);}}int mflow = max_flow(S, T);if(mflow != N){cout << -1 << endl;return;}for(int i = 0; i < N;i++){for(auto e:G[i]){if(e.cap == 0){cout << e.to-N << endl;break;}}}}int main(void) {cin.tie(0); ios_base::sync_with_stdio(false);solve();return 0;}