結果
問題 | No.2914 正閉路検出 |
ユーザー | 👑 potato167 |
提出日時 | 2024-10-04 21:59:26 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 84 ms / 2,000 ms |
コード長 | 5,098 bytes |
コンパイル時間 | 2,532 ms |
コンパイル使用メモリ | 218,676 KB |
実行使用メモリ | 18,280 KB |
最終ジャッジ日時 | 2024-10-04 21:59:34 |
合計ジャッジ時間 | 7,255 ms |
ジャッジサーバーID (参考情報) |
judge1 / 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 | 2 ms
5,248 KB |
testcase_03 | AC | 1 ms
5,248 KB |
testcase_04 | AC | 1 ms
5,248 KB |
testcase_05 | AC | 1 ms
5,248 KB |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | AC | 2 ms
5,248 KB |
testcase_08 | AC | 2 ms
5,248 KB |
testcase_09 | AC | 2 ms
5,248 KB |
testcase_10 | AC | 2 ms
5,248 KB |
testcase_11 | AC | 2 ms
5,248 KB |
testcase_12 | AC | 2 ms
5,248 KB |
testcase_13 | AC | 2 ms
5,248 KB |
testcase_14 | AC | 2 ms
5,248 KB |
testcase_15 | AC | 2 ms
5,248 KB |
testcase_16 | AC | 2 ms
5,248 KB |
testcase_17 | AC | 2 ms
5,248 KB |
testcase_18 | AC | 2 ms
5,248 KB |
testcase_19 | AC | 8 ms
5,248 KB |
testcase_20 | AC | 17 ms
5,248 KB |
testcase_21 | AC | 6 ms
5,248 KB |
testcase_22 | AC | 19 ms
5,248 KB |
testcase_23 | AC | 14 ms
5,248 KB |
testcase_24 | AC | 25 ms
5,248 KB |
testcase_25 | AC | 3 ms
5,248 KB |
testcase_26 | AC | 4 ms
5,248 KB |
testcase_27 | AC | 24 ms
5,504 KB |
testcase_28 | AC | 28 ms
6,528 KB |
testcase_29 | AC | 57 ms
16,804 KB |
testcase_30 | AC | 13 ms
10,496 KB |
testcase_31 | AC | 23 ms
5,248 KB |
testcase_32 | AC | 26 ms
6,528 KB |
testcase_33 | AC | 13 ms
10,368 KB |
testcase_34 | AC | 57 ms
16,676 KB |
testcase_35 | AC | 59 ms
16,680 KB |
testcase_36 | AC | 59 ms
16,684 KB |
testcase_37 | AC | 49 ms
17,496 KB |
testcase_38 | AC | 42 ms
17,228 KB |
testcase_39 | AC | 60 ms
18,124 KB |
testcase_40 | AC | 63 ms
17,596 KB |
testcase_41 | AC | 69 ms
18,044 KB |
testcase_42 | AC | 63 ms
17,860 KB |
testcase_43 | AC | 74 ms
17,468 KB |
testcase_44 | AC | 68 ms
18,280 KB |
testcase_45 | AC | 60 ms
17,748 KB |
testcase_46 | AC | 60 ms
17,688 KB |
testcase_47 | AC | 65 ms
17,936 KB |
testcase_48 | AC | 59 ms
18,032 KB |
testcase_49 | AC | 60 ms
17,672 KB |
testcase_50 | AC | 84 ms
18,060 KB |
testcase_51 | AC | 47 ms
15,304 KB |
testcase_52 | AC | 46 ms
15,304 KB |
testcase_53 | AC | 45 ms
15,308 KB |
testcase_54 | AC | 42 ms
15,304 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll=long long; using ld=long double; const ll ILL=2167167167167167167; const int INF=2100000000; #define rep(i,a,b) for (int i=(int)(a);i<(int)(b);i++) #define all(p) p.begin(),p.end() template<class T> using _pq = priority_queue<T, vector<T>, greater<T>>; template<class T> ll LB(vector<T> &v,T a){return lower_bound(v.begin(),v.end(),a)-v.begin();} template<class T> ll UB(vector<T> &v,T a){return upper_bound(v.begin(),v.end(),a)-v.begin();} template<class T> bool chmin(T &a,T b){if(a>b){a=b;return 1;}else return 0;} template<class T> bool chmax(T &a,T b){if(a<b){a=b;return 1;}else return 0;} template<class T> void So(vector<T> &v) {sort(v.begin(),v.end());} template<class T> void Sore(vector<T> &v) {sort(v.begin(),v.end(),[](T x,T y){return x>y;});} bool yneos(bool a,bool upp=0){if(a){cout<<(upp?"YES\n":"Yes\n");}else{cout<<(upp?"NO\n":"No\n");}return a;} template<class T> void vec_out(vector<T> &p,int ty=0){ if(ty==2){cout<<'{';for(int i=0;i<(int)p.size();i++){if(i){cout<<",";}cout<<'"'<<p[i]<<'"';}cout<<"}\n";} else{if(ty==1){cout<<p.size()<<"\n";}for(int i=0;i<(int)(p.size());i++){if(i) cout<<" ";cout<<p[i];}cout<<"\n";}} template<class T> T vec_min(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmin(ans,x);return ans;} template<class T> T vec_max(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmax(ans,x);return ans;} template<class T> T vec_sum(vector<T> &a){T ans=T(0);for(auto &x:a) ans+=x;return ans;} int pop_count(long long a){int res=0;while(a){res+=(a&1),a>>=1;}return res;} template<class T> bool inside(T l,T x,T r){return l<=x&&x<r;} namespace po167{ struct UF { using _F = int; int _n; std::vector<_F> wei; std::vector<int> q; int component; UF(int n):_n(n), wei(n), component(n), par(n){ for (int i = 0; i < n; i++){ wei[i] =1, par[i] = i; } } void intialize(){ for (auto x : q){ wei[root(x)] = 1; par[x] = x; } component = (int)par.size(); q = {}; } //根っこを返す int root(int a){ assert(0 <= a && a < _n); if (a == par[a]) return a; return par[a] = root(par[a]); } //trueなら1,falseなら0 int same(int a, int b){ assert(0 <= a && a < _n); assert(0 <= b && b < _n); if(root(a) == root(b)) return 1; else return 0; } _F size(int a){ return wei[root(a)]; } //a,bが違う根っこの元なら結合する,結合したらtrueを返す bool unite(int a,int b){ a = root(a), b = root(b); if (a == b) return false; if (wei[a] < wei[b]) std::swap(a, b); par[b] = a; q.push_back(b); wei[a] += wei[b]; component--; return true; } private: std::vector<int> par; }; } using po167::UF; void solve(); // CYAN / FREDERIC int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int t = 1; // cin >> t; rep(i, 0, t) solve(); } void solve(){ int N, M; cin >> N >> M; struct edge { int to; int ei; ll cost; }; vector<vector<edge>> G(N); UF T(N); vector<int> A(M), B(M), U(M); vector<ll> C(M); rep(i, 0, M){ cin >> A[i] >> B[i] >> C[i]; A[i]--, B[i]--; if (T.unite(A[i], B[i])){ G[A[i]].push_back({B[i], i + 1, C[i]}); G[B[i]].push_back({A[i], i + 1, -C[i]}); U[i] = 1; } } vector<int> seen(N), depth(N); vector<edge> pare(N); vector<ll> dist(N); rep(i, 0, N) if (seen[i] == 0){ vector<int> order = {i}; seen[i] = 1; rep(rp, 0, order.size()){ int a = order[rp]; for (auto e : G[a]){ if (chmax(seen[e.to], 1)){ depth[e.to] = depth[a] + 1; dist[e.to] = dist[a] + e.cost; order.push_back(e.to); } else{ pare[a] = e; } } } } rep(i, 0, M) if (U[i] == 0){ ll tmp = dist[A[i]] + C[i] - dist[B[i]]; if (tmp){ if (tmp < 0) swap(A[i], B[i]); vector<int> ans1 = {i + 1}, ans2; while (A[i] != B[i]){ if (depth[A[i]] < depth[B[i]]){ ans1.push_back(pare[B[i]].ei); B[i] = pare[B[i]].to; } else{ ans2.push_back(pare[A[i]].ei); A[i] = pare[A[i]].to; } } reverse(all(ans2)); ans2.insert(ans2.end(), all(ans1)); cout << ans2.size() << "\n"; cout << A[i] + 1 << "\n"; vec_out(ans2); return; } } cout << "-1\n"; }