結果
問題 | No.2914 正閉路検出 |
ユーザー | umimel |
提出日時 | 2024-10-04 22:57:16 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 87 ms / 2,000 ms |
コード長 | 4,296 bytes |
コンパイル時間 | 1,779 ms |
コンパイル使用メモリ | 188,316 KB |
実行使用メモリ | 32,480 KB |
最終ジャッジ日時 | 2024-10-04 22:57:28 |
合計ジャッジ時間 | 6,700 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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
6,820 KB |
testcase_01 | AC | 2 ms
6,816 KB |
testcase_02 | AC | 1 ms
6,816 KB |
testcase_03 | AC | 2 ms
6,816 KB |
testcase_04 | AC | 1 ms
6,816 KB |
testcase_05 | AC | 1 ms
6,816 KB |
testcase_06 | AC | 1 ms
6,820 KB |
testcase_07 | AC | 2 ms
6,816 KB |
testcase_08 | AC | 1 ms
6,816 KB |
testcase_09 | AC | 2 ms
6,820 KB |
testcase_10 | AC | 1 ms
6,816 KB |
testcase_11 | AC | 2 ms
6,820 KB |
testcase_12 | AC | 2 ms
6,820 KB |
testcase_13 | AC | 1 ms
6,816 KB |
testcase_14 | AC | 1 ms
6,820 KB |
testcase_15 | AC | 1 ms
6,816 KB |
testcase_16 | AC | 2 ms
6,816 KB |
testcase_17 | AC | 2 ms
6,820 KB |
testcase_18 | AC | 1 ms
6,820 KB |
testcase_19 | AC | 11 ms
7,164 KB |
testcase_20 | AC | 23 ms
12,796 KB |
testcase_21 | AC | 7 ms
6,820 KB |
testcase_22 | AC | 29 ms
16,880 KB |
testcase_23 | AC | 20 ms
11,788 KB |
testcase_24 | AC | 32 ms
18,640 KB |
testcase_25 | AC | 3 ms
6,816 KB |
testcase_26 | AC | 6 ms
6,816 KB |
testcase_27 | AC | 39 ms
18,820 KB |
testcase_28 | AC | 48 ms
20,204 KB |
testcase_29 | AC | 74 ms
25,712 KB |
testcase_30 | AC | 11 ms
8,912 KB |
testcase_31 | AC | 38 ms
19,132 KB |
testcase_32 | AC | 49 ms
21,252 KB |
testcase_33 | AC | 11 ms
8,780 KB |
testcase_34 | AC | 75 ms
24,844 KB |
testcase_35 | AC | 73 ms
25,280 KB |
testcase_36 | AC | 71 ms
26,280 KB |
testcase_37 | AC | 61 ms
32,444 KB |
testcase_38 | AC | 54 ms
30,920 KB |
testcase_39 | AC | 76 ms
27,344 KB |
testcase_40 | AC | 74 ms
32,184 KB |
testcase_41 | AC | 87 ms
28,932 KB |
testcase_42 | AC | 76 ms
32,480 KB |
testcase_43 | AC | 73 ms
31,692 KB |
testcase_44 | AC | 70 ms
27,188 KB |
testcase_45 | AC | 78 ms
32,192 KB |
testcase_46 | AC | 76 ms
30,948 KB |
testcase_47 | AC | 76 ms
30,468 KB |
testcase_48 | AC | 77 ms
27,980 KB |
testcase_49 | AC | 77 ms
31,320 KB |
testcase_50 | AC | 76 ms
31,472 KB |
testcase_51 | AC | 47 ms
21,756 KB |
testcase_52 | AC | 48 ms
22,748 KB |
testcase_53 | AC | 47 ms
21,936 KB |
testcase_54 | AC | 48 ms
22,568 KB |
ソースコード
#include<bits/stdc++.h> using namespace std; using ll = long long; #define all(a) (a).begin(), (a).end() #define pb push_back #define fi first #define se second mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count()); const ll MOD1000000007 = 1000000007; const ll MOD998244353 = 998244353; const ll MOD[3] = {999727999, 1070777777, 1000000007}; const ll LINF = 1LL << 60LL; const int IINF = (1 << 30) - 2; template<typename T> struct edge{ int from; int to; T cost; int id; edge(){} edge(int to, T cost=1) : from(-1), to(to), cost(cost){} edge(int to, T cost, int id) : from(-1), to(to), cost(cost), id(id){} edge(int from, int to, T cost, int id) : from(from), to(to), cost(cost), id(id){} void reverse(){swap(from, to);} }; template<typename T> struct edges : std::vector<edge<T>>{ void sort(){ std::sort( (*this).begin(), (*this).end(), [](const edge<T>& a, const edge<T>& b){ return a.cost < b.cost; } ); } }; template<typename T = bool> struct graph : std::vector<edges<T>>{ private: int n = 0; int m = 0; edges<T> es; bool dir; public: graph(int n, bool dir) : n(n), dir(dir){ (*this).resize(n); } void add_edge(int from, int to, T cost=1){ if(dir){ es.push_back(edge<T>(from, to, cost, m)); (*this)[from].push_back(edge<T>(from, to, cost, m++)); }else{ if(from > to) swap(from, to); es.push_back(edge<T>(from, to, cost, m)); (*this)[from].push_back(edge<T>(from, to, cost, m)); (*this)[to].push_back(edge<T>(to, from, cost, m++)); } } int get_vnum(){ return n; } int get_enum(){ return m; } bool get_dir(){ return dir; } edge<T> get_edge(int i){ return es[i]; } edges<T> get_edge_set(){ return es; } }; template<typename T> struct redge{ int from, to; T cap, cost; int rev; redge(int to, T cap, T cost=(T)(1)) : from(-1), to(to), cap(cap), cost(cost){} redge(int to, T cap, T cost, int rev) : from(-1), to(to), cap(cap), cost(cost), rev(rev){} }; template<typename T> using Edges = vector<edge<T>>; template<typename T> using weighted_graph = vector<Edges<T>>; template<typename T> using tree = vector<Edges<T>>; using unweighted_graph = vector<vector<int>>; template<typename T> using residual_graph = vector<vector<redge<T>>>; void solve(){ int n, m; cin >> n >> m; graph<ll> G(n, true); vector<tuple<int, int, ll>> es(2*m); for(int i=0; i<m; i++){ int u, v; cin >> u >> v; ll w; cin >> w; u--; v--; es[2*i] = {u, v, w}; es[2*i+1] = {v, u, -w}; G.add_edge(u, v, w); G.add_edge(v, u, -w); } vector<ll> dist(n, -LINF); vector<int> dep(n, 0); vector<int> epar(n, -1), vpar(n, -1); function<void(int, int)> dfs = [&](int v, int p){ for(auto e : G[v]) if(e.to != p && dist[e.to] == -LINF){ dist[e.to] = dist[v] + e.cost; dep[e.to] = dep[v] + 1; epar[e.to] = e.id; vpar[e.to] = v; dfs(e.to, v); } }; for(int s=0; s<n; s++) if(dist[s]==-LINF){ dist[s] = 0; dfs(s, -1); } for(int v=0; v<n; v++)for(auto e : G[v]){ if(dist[e.from]-dist[e.to]+e.cost!=0 && dep[e.to] < dep[e.from]){ vector<int> path; int a = e.to, b = e.from; path.pb(e.id); while(b != a){ path.pb(epar[b]); b = vpar[b]; } reverse(all(path)); ll sum = 0; for(int i : path) sum += get<2>(es[i]); if(sum < 0) reverse(all(path)); cout << (int)path.size() << '\n'; cout << a+1 << '\n'; for(int i=0; i<(int)path.size(); i++){ cout << path[i]/2+1; if(i<(int)path.size()-1) cout << ' '; } cout << '\n'; return; } } cout << -1 << '\n'; } int main(){ cin.tie(nullptr); ios::sync_with_stdio(false); int T=1; //cin >> T; while(T--) solve(); }