結果
問題 | No.1647 Travel in Mitaru city 2 |
ユーザー | tokusakurai |
提出日時 | 2021-08-13 22:06:47 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 65 ms / 2,500 ms |
コード長 | 3,612 bytes |
コンパイル時間 | 2,208 ms |
コンパイル使用メモリ | 212,088 KB |
実行使用メモリ | 17,572 KB |
最終ジャッジ日時 | 2024-10-13 03:16:16 |
合計ジャッジ時間 | 7,662 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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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 | 1 ms
5,248 KB |
testcase_02 | AC | 1 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 1 ms
5,248 KB |
testcase_07 | AC | 3 ms
5,248 KB |
testcase_08 | AC | 55 ms
16,488 KB |
testcase_09 | AC | 48 ms
15,520 KB |
testcase_10 | AC | 55 ms
16,548 KB |
testcase_11 | AC | 44 ms
14,080 KB |
testcase_12 | AC | 48 ms
13,952 KB |
testcase_13 | AC | 49 ms
14,208 KB |
testcase_14 | AC | 61 ms
16,840 KB |
testcase_15 | AC | 53 ms
16,708 KB |
testcase_16 | AC | 52 ms
16,180 KB |
testcase_17 | AC | 45 ms
14,208 KB |
testcase_18 | AC | 45 ms
14,372 KB |
testcase_19 | AC | 52 ms
16,384 KB |
testcase_20 | AC | 52 ms
15,728 KB |
testcase_21 | AC | 56 ms
16,592 KB |
testcase_22 | AC | 63 ms
17,132 KB |
testcase_23 | AC | 60 ms
17,132 KB |
testcase_24 | AC | 55 ms
16,084 KB |
testcase_25 | AC | 58 ms
16,572 KB |
testcase_26 | AC | 63 ms
17,256 KB |
testcase_27 | AC | 60 ms
17,300 KB |
testcase_28 | AC | 61 ms
17,568 KB |
testcase_29 | AC | 65 ms
17,568 KB |
testcase_30 | AC | 50 ms
16,712 KB |
testcase_31 | AC | 60 ms
17,568 KB |
testcase_32 | AC | 53 ms
17,068 KB |
testcase_33 | AC | 49 ms
16,164 KB |
testcase_34 | AC | 61 ms
17,568 KB |
testcase_35 | AC | 59 ms
16,392 KB |
testcase_36 | AC | 60 ms
17,572 KB |
testcase_37 | AC | 60 ms
17,568 KB |
testcase_38 | AC | 50 ms
15,988 KB |
testcase_39 | AC | 45 ms
14,892 KB |
testcase_40 | AC | 52 ms
15,876 KB |
testcase_41 | AC | 52 ms
15,148 KB |
testcase_42 | AC | 60 ms
15,956 KB |
testcase_43 | AC | 2 ms
6,816 KB |
testcase_44 | AC | 4 ms
8,648 KB |
testcase_45 | AC | 42 ms
13,660 KB |
testcase_46 | AC | 51 ms
13,684 KB |
testcase_47 | AC | 42 ms
13,680 KB |
testcase_48 | AC | 46 ms
13,624 KB |
testcase_49 | AC | 42 ms
13,520 KB |
testcase_50 | AC | 44 ms
13,676 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; #define rep(i, n) for(int i = 0; i < n; i++) #define rep2(i, x, n) for(int i = x; i <= n; i++) #define rep3(i, x, n) for(int i = x; i >= n; i--) #define each(e, v) for(auto &e: v) #define pb push_back #define eb emplace_back #define all(x) x.begin(), x.end() #define rall(x) x.rbegin(), x.rend() #define sz(x) (int)x.size() using ll = long long; using pii = pair<int, int>; using pil = pair<int, ll>; using pli = pair<ll, int>; using pll = pair<ll, ll>; const int MOD = 1000000007; //const int MOD = 998244353; const int inf = (1<<30)-1; const ll INF = (1LL<<60)-1; template<typename T> bool chmax(T &x, const T &y) {return (x < y)? (x = y, true) : false;}; template<typename T> bool chmin(T &x, const T &y) {return (x > y)? (x = y, true) : false;}; struct io_setup{ io_setup(){ ios_base::sync_with_stdio(false); cin.tie(NULL); cout << fixed << setprecision(15); } } io_setup; template<bool directed = false> struct Graph{ struct edge{ int to, id; edge(int to, int id) : to(to), id(id) {} }; vector<vector<edge>> es; const int n; int m; vector<int> used; Graph(int n) : es(n), n(n), m(0), used(n) {} void add_edge(int from, int to){ es[from].emplace_back(to, m); if(!directed) es[to].emplace_back(from, m); m++; } vector<int> ret_path; bool detect_path(int now, int t, bool use_id = false){ used[now] = true; if(now == t){ if(!use_id) ret_path.push_back(now); return true; } for(auto &e : es[now]){ if(used[e.to]) continue; if(detect_path(e.to, t, use_id)){ ret_path.push_back(use_id? e.id : now); return true; } } return false; } vector<int> find_path(int s, int t, bool use_id = false){ //点素なs-tパスを1つ検出 ret_path.clear(), fill(begin(used), end(used), 0); detect_path(s, t, use_id); reverse(begin(ret_path), end(ret_path)); return ret_path; } vector<int> ret_cycle; int detect_cycle(int now, int pre = -1, bool use_id = false){ if(used[now]++) return 1; for(auto &e: es[now]){ if(e.id == pre) continue; int k = detect_cycle(e.to, e.id, use_id); if(k == 2) return 2; if(k == 1){ ret_cycle.push_back(use_id? e.id : now); return used[now]; } } return 0; } vector<int> find_cycle(bool use_id = false){ //点素な閉路を1つ検出 ret_cycle.clear(), fill(begin(used), end(used), 0); for(int i = 0; i < n; i++){ if(used[i]) continue; detect_cycle(i, -1, use_id); if(!ret_cycle.empty()){ reverse(begin(ret_cycle), end(ret_cycle)); return ret_cycle; } } return {}; } }; int main(){ int H, W, N; cin >> H >> W >> N; Graph G(H+W); vector<int> u(N), v(N); rep(i, N){ int x, y; cin >> x >> y; x--, y--; G.add_edge(x, H+y); u[i] = x, v[i] = y; } vector<int> c = G.find_cycle(true); if(empty(c)) cout << "-1\n"; else{ int n = sz(c); rep(i, n){ int j = (i+1)%n; if(v[c[i]] == v[c[j]]){ cout << n << '\n'; rep(k, n){ cout << c[(i+k)%n]+1 << (k == n-1? '\n' : ' '); } return 0; } } } }