結果
問題 | No.2464 To DAG |
ユーザー | Forested |
提出日時 | 2023-09-08 22:27:21 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
RE
|
実行時間 | - |
コード長 | 3,341 bytes |
コンパイル時間 | 1,328 ms |
コンパイル使用メモリ | 140,116 KB |
実行使用メモリ | 52,748 KB |
最終ジャッジ日時 | 2024-06-26 15:36:02 |
合計ジャッジ時間 | 13,902 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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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 | 2 ms
5,376 KB |
testcase_02 | AC | 172 ms
52,748 KB |
testcase_03 | RE | - |
testcase_04 | RE | - |
testcase_05 | RE | - |
testcase_06 | RE | - |
testcase_07 | RE | - |
testcase_08 | RE | - |
testcase_09 | RE | - |
testcase_10 | RE | - |
testcase_11 | RE | - |
testcase_12 | RE | - |
testcase_13 | RE | - |
testcase_14 | AC | 99 ms
15,532 KB |
testcase_15 | RE | - |
testcase_16 | RE | - |
testcase_17 | WA | - |
testcase_18 | AC | 38 ms
9,652 KB |
testcase_19 | AC | 3 ms
5,376 KB |
testcase_20 | AC | 2 ms
5,376 KB |
testcase_21 | AC | 2 ms
5,376 KB |
testcase_22 | RE | - |
testcase_23 | RE | - |
testcase_24 | RE | - |
testcase_25 | RE | - |
testcase_26 | AC | 26 ms
7,048 KB |
testcase_27 | AC | 172 ms
24,460 KB |
testcase_28 | AC | 159 ms
24,572 KB |
testcase_29 | AC | 167 ms
23,724 KB |
testcase_30 | AC | 123 ms
16,076 KB |
testcase_31 | AC | 120 ms
14,608 KB |
testcase_32 | AC | 105 ms
14,088 KB |
testcase_33 | RE | - |
testcase_34 | RE | - |
testcase_35 | RE | - |
testcase_36 | RE | - |
testcase_37 | RE | - |
testcase_38 | RE | - |
testcase_39 | AC | 6 ms
11,392 KB |
testcase_40 | AC | 6 ms
11,492 KB |
ソースコード
#ifndef LOCAL #define FAST_IO #endif // ============ #include <algorithm> #include <array> #include <bitset> #include <cassert> #include <cmath> #include <iomanip> #include <iostream> #include <list> #include <map> #include <numeric> #include <queue> #include <random> #include <set> #include <stack> #include <string> #include <tuple> #include <unordered_map> #include <unordered_set> #include <utility> #include <vector> #define OVERRIDE(a, b, c, d, ...) d #define REP2(i, n) for (i32 i = 0; i < (i32)(n); ++i) #define REP3(i, m, n) for (i32 i = (i32)(m); i < (i32)(n); ++i) #define REP(...) OVERRIDE(__VA_ARGS__, REP3, REP2)(__VA_ARGS__) #define PER(i, n) for (i32 i = (i32)(n) - 1; i >= 0; --i) #define ALL(x) begin(x), end(x) using namespace std; using u32 = unsigned int; using u64 = unsigned long long; using i32 = signed int; using i64 = signed long long; using f64 = double; using f80 = long double; template <typename T> using Vec = vector<T>; template <typename T> bool chmin(T &x, const T &y) { if (x > y) { x = y; return true; } return false; } template <typename T> bool chmax(T &x, const T &y) { if (x < y) { x = y; return true; } return false; } #ifdef INT128 using u128 = __uint128_t; using i128 = __int128_t; istream &operator>>(istream &is, i128 &x) { i64 v; is >> v; x = v; return is; } ostream &operator<<(ostream &os, i128 x) { os << (i64)x; return os; } istream &operator>>(istream &is, u128 &x) { u64 v; is >> v; x = v; return is; } ostream &operator<<(ostream &os, u128 x) { os << (u64)x; return os; } #endif [[maybe_unused]] constexpr i32 INF = 1000000100; [[maybe_unused]] constexpr i64 INF64 = 3000000000000000100; struct SetUpIO { SetUpIO() { #ifdef FAST_IO ios::sync_with_stdio(false); cin.tie(nullptr); #endif cout << fixed << setprecision(15); } } set_up_io; // ============ #ifdef DEBUGF #else #define DBG(x) (void)0 #endif int main() { i32 n, m; cin >> n >> m; Vec<Vec<pair<i32, i32>>> g(n); REP(i, m) { i32 u, v; cin >> u >> v; --u; --v; g[u].emplace_back(v, i); } Vec<i32> vis(n, 0); Vec<tuple<i32, i32, i32>> edges; Vec<tuple<i32, i32, i32>> ans; const auto dfs = [&](const auto &dfs, i32 v) -> void { vis[v] = 1; while (!g[v].empty()) { auto [u, e] = g[v].back(); g[v].pop_back(); if (!vis[u]) { edges.emplace_back(v, u, e); dfs(dfs, u); if (!vis[v]) { return; } } else { while (get<0>(edges.back()) != u) { auto [a, b, c] = edges.back(); edges.pop_back(); vis[b] = 0; } edges.pop_back(); return; } } if (!edges.empty()) { ans.emplace_back(edges.back()); edges.pop_back(); } vis[v] = 0; }; DBG(g); REP(i, n) { if (g[i].size()) { dfs(dfs, i); } DBG(g); } cout << n << ' ' << ans.size() << '\n'; for (auto [u, v, e] : ans) { cout << u + 1 << ' ' << v + 1 << '\n'; } }