結果
問題 | No.2316 Freight Train |
ユーザー | Forested |
提出日時 | 2023-05-26 21:25:21 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 138 ms / 2,000 ms |
コード長 | 4,187 bytes |
コンパイル時間 | 1,491 ms |
コンパイル使用メモリ | 135,856 KB |
実行使用メモリ | 15,756 KB |
最終ジャッジ日時 | 2024-06-07 05:19:29 |
合計ジャッジ時間 | 6,175 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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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
5,376 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 138 ms
15,220 KB |
testcase_04 | AC | 52 ms
9,472 KB |
testcase_05 | AC | 43 ms
9,344 KB |
testcase_06 | AC | 10 ms
5,376 KB |
testcase_07 | AC | 51 ms
6,016 KB |
testcase_08 | AC | 94 ms
15,648 KB |
testcase_09 | AC | 74 ms
11,320 KB |
testcase_10 | AC | 66 ms
9,728 KB |
testcase_11 | AC | 90 ms
14,592 KB |
testcase_12 | AC | 91 ms
13,488 KB |
testcase_13 | AC | 121 ms
15,700 KB |
testcase_14 | AC | 116 ms
15,744 KB |
testcase_15 | AC | 117 ms
15,744 KB |
testcase_16 | AC | 119 ms
15,712 KB |
testcase_17 | AC | 118 ms
15,756 KB |
testcase_18 | AC | 117 ms
15,744 KB |
testcase_19 | AC | 119 ms
15,736 KB |
testcase_20 | AC | 126 ms
15,744 KB |
testcase_21 | AC | 119 ms
15,744 KB |
testcase_22 | AC | 121 ms
15,744 KB |
testcase_23 | AC | 75 ms
15,744 KB |
testcase_24 | AC | 86 ms
15,744 KB |
testcase_25 | AC | 62 ms
9,472 KB |
testcase_26 | AC | 59 ms
9,432 KB |
testcase_27 | AC | 28 ms
5,376 KB |
testcase_28 | AC | 2 ms
5,376 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; } template <typename T> Vec<tuple<i32, i32, T>> runlength(const Vec<T> &a) { if (a.empty()) { return Vec<tuple<i32, i32, T>>(); } Vec<tuple<i32, i32, T>> ret; i32 prv = 0; REP(i, 1, a.size()) { if (a[i - 1] != a[i]) { ret.emplace_back(prv, i, a[i - 1]); prv = i; } } ret.emplace_back(prv, (i32)a.size(), a.back()); return ret; } #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 // ============ #include <queue> #include <utility> #include <vector> class ConnectedComponents { std::vector<int> number; int comp; public: template <typename G> ConnectedComponents(const G &graph) : number((int) graph.size(), -1), comp(0) { std::queue<int> que; for (int i = 0; i < (int) graph.size(); ++i) { if (number[i] != -1) { continue; } que.push(i); number[i] = comp; while (!que.empty()) { int v = que.front(); que.pop(); for (const auto &e : graph[v]) { if (number[(int) e] == -1) { number[(int) e] = number[v]; que.push((int)e); } } } ++comp; } } int operator[](int v) const { assert(v >= 0 && v < (int) number.size()); return number[v]; } std::vector<std::vector<int>> groups() const { std::vector<std::vector<int>> ret(comp); for (int i = 0; i < (int) number.size(); ++i) ret[number[i]].push_back(i); return ret; } int components() const { return comp; } }; // ============ int main() { i32 n, q; cin >> n >> q; Vec<i32> p(n); REP(i, n) { cin >> p[i]; if (p[i] != -1) { --p[i]; } } Vec<Vec<i32>> g(n); REP(i, n) { if (p[i] != -1) { g[p[i]].push_back(i); g[i].push_back(p[i]); } } ConnectedComponents cc(g); while (q--) { i32 x, y; cin >> x >> y; --x; --y; cout << (cc[x] == cc[y] ? "Yes\n" : "No\n"); } }