結果
問題 | No.2464 To DAG |
ユーザー | 👑 hos.lyric |
提出日時 | 2023-09-08 21:29:25 |
言語 | C++14 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,989 bytes |
コンパイル時間 | 1,148 ms |
コンパイル使用メモリ | 110,168 KB |
実行使用メモリ | 33,040 KB |
最終ジャッジ日時 | 2024-06-26 14:20:10 |
合計ジャッジ時間 | 7,092 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
6,812 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 87 ms
18,732 KB |
testcase_03 | WA | - |
testcase_04 | AC | 1,128 ms
23,620 KB |
testcase_05 | AC | 742 ms
22,864 KB |
testcase_06 | AC | 672 ms
21,312 KB |
testcase_07 | AC | 1,187 ms
19,172 KB |
testcase_08 | AC | 990 ms
19,004 KB |
testcase_09 | AC | 707 ms
17,108 KB |
testcase_10 | AC | 527 ms
16,600 KB |
testcase_11 | AC | 473 ms
12,944 KB |
testcase_12 | AC | 371 ms
11,200 KB |
testcase_13 | WA | - |
testcase_14 | AC | 162 ms
20,004 KB |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | AC | 2 ms
6,940 KB |
testcase_20 | AC | 2 ms
6,940 KB |
testcase_21 | AC | 2 ms
6,944 KB |
testcase_22 | AC | 132 ms
18,112 KB |
testcase_23 | AC | 134 ms
18,772 KB |
testcase_24 | AC | 116 ms
19,708 KB |
testcase_25 | AC | 132 ms
19,424 KB |
testcase_26 | AC | 64 ms
8,204 KB |
testcase_27 | AC | 356 ms
33,040 KB |
testcase_28 | AC | 389 ms
30,164 KB |
testcase_29 | AC | 261 ms
29,664 KB |
testcase_30 | AC | 510 ms
19,244 KB |
testcase_31 | AC | 1,168 ms
20,432 KB |
testcase_32 | AC | 1,610 ms
18,456 KB |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | AC | 98 ms
17,388 KB |
testcase_36 | AC | 98 ms
16,924 KB |
testcase_37 | AC | 74 ms
19,536 KB |
testcase_38 | AC | 74 ms
15,736 KB |
testcase_39 | AC | 7 ms
9,216 KB |
testcase_40 | AC | 7 ms
9,344 KB |
ソースコード
#include <cassert> #include <cmath> #include <cstdint> #include <cstdio> #include <cstdlib> #include <cstring> #include <algorithm> #include <bitset> #include <complex> #include <deque> #include <functional> #include <iostream> #include <limits> #include <map> #include <numeric> #include <queue> #include <set> #include <sstream> #include <string> #include <unordered_map> #include <unordered_set> #include <utility> #include <vector> using namespace std; using Int = long long; template <class T1, class T2> ostream &operator<<(ostream &os, const pair<T1, T2> &a) { return os << "(" << a.first << ", " << a.second << ")"; }; template <class T> ostream &operator<<(ostream &os, const vector<T> &as) { const int sz = as.size(); os << "["; for (int i = 0; i < sz; ++i) { if (i >= 256) { os << ", ..."; break; } if (i > 0) { os << ", "; } os << as[i]; } return os << "]"; } template <class T> void pv(T a, T b) { for (T i = a; i != b; ++i) cerr << *i << " "; cerr << endl; } template <class T> bool chmin(T &t, const T &f) { if (t > f) { t = f; return true; } return false; } template <class T> bool chmax(T &t, const T &f) { if (t < f) { t = f; return true; } return false; } #define COLOR(s) ("\x1b[" s "m") template <class Flow> struct MaxFlow { // Watch out when using types other than int and long long. static constexpr Flow FLOW_EPS = 1e-10L; static constexpr Flow FLOW_INF = std::numeric_limits<Flow>::max(); int n, m; vector<int> ptr, nxt, zu; vector<Flow> capa; explicit MaxFlow(int n_) : n(n_), m(0), ptr(n_, -1) {} void ae(int u, int v, Flow w0, Flow w1 = 0) { assert(0 <= u); assert(u < n); assert(0 <= v); assert(v < n); assert(0 <= w0); assert(0 <= w1); nxt.push_back(ptr[u]); zu.push_back(v); capa.push_back(w0); ptr[u] = m++; nxt.push_back(ptr[v]); zu.push_back(u); capa.push_back(w1); ptr[v] = m++; } vector<int> see, lev, que; Flow augment(int u, int t, Flow limFlow) { if (u == t) return limFlow; for (int &i = see[u]; ~i; i = nxt[i]) if (capa[i] > FLOW_EPS) { const int v = zu[i]; if (lev[u] < lev[v]) { const Flow f = augment(v, t, min(limFlow, capa[i])); if (f > FLOW_EPS) { capa[i] -= f; capa[i ^ 1] += f; return f; } } } return 0; } bool bfs(int s, int t) { for (int u = 0; u < n; ++u) { see[u] = ptr[u]; lev[u] = -1; } auto head = que.begin(), tail = que.begin(); for (lev[*tail++ = s] = 0; head != tail; ) { const int u = *head++; for (int i = ptr[u]; ~i; i = nxt[i]) if (capa[i] > FLOW_EPS) { const int v = zu[i]; if (!~lev[v]) { lev[*tail++ = v] = lev[u] + 1; if (v == t) return true; } } } return false; } Flow run(int s, int t, Flow limFlow = FLOW_INF) { see.resize(n); lev.resize(n); que.resize(n); Flow flow = 0; for (; flow + FLOW_EPS < limFlow && bfs(s, t); ) { for (Flow f; (f = augment(s, t, limFlow - flow)) > FLOW_EPS; flow += f) {} } return flow; } }; //////////////////////////////////////////////////////////////////////////////// int N, M; vector<int> A, B; int main() { for (; ~scanf("%d%d", &N, &M); ) { A.resize(M); B.resize(M); for (int i = 0; i < M; ++i) { scanf("%d%d", &A[i], &B[i]); --A[i]; --B[i]; } vector<int> bal(N, 0); for (int i = 0; i < M; ++i) { ++bal[A[i]]; --bal[B[i]]; } MaxFlow<int> mf(N + 2); const int src = N, snk = N + 1; for (int i = 0; i < M; ++i) { mf.ae(A[i], B[i], 1); } for (int u = 0; u < N; ++u) { if (bal[u] > 0) mf.ae(src, u, +bal[u]); if (bal[u] < 0) mf.ae(u, snk, -bal[u]); } mf.run(src, snk); vector<int> ans; for (int i = 0; i < M; ++i) if (!mf.capa[i << 1]) { ans.push_back(i); } printf("%d %d\n", N, (int)ans.size()); for (const int i : ans) { printf("%d %d\n", A[i] + 1, B[i] + 1); } cerr<<"========"<<endl; } return 0; }