結果
問題 | No.2316 Freight Train |
ユーザー | kaikey |
提出日時 | 2023-05-26 21:25:38 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 90 ms / 2,000 ms |
コード長 | 6,659 bytes |
コンパイル時間 | 2,814 ms |
コンパイル使用メモリ | 220,800 KB |
実行使用メモリ | 5,760 KB |
最終ジャッジ日時 | 2024-12-25 04:40:12 |
合計ジャッジ時間 | 7,191 ms |
ジャッジサーバーID (参考情報) |
judge2 / 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 | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 81 ms
5,376 KB |
testcase_04 | AC | 40 ms
5,248 KB |
testcase_05 | AC | 33 ms
5,248 KB |
testcase_06 | AC | 10 ms
5,248 KB |
testcase_07 | AC | 54 ms
5,248 KB |
testcase_08 | AC | 56 ms
5,760 KB |
testcase_09 | AC | 60 ms
5,248 KB |
testcase_10 | AC | 57 ms
5,248 KB |
testcase_11 | AC | 63 ms
5,376 KB |
testcase_12 | AC | 71 ms
5,248 KB |
testcase_13 | AC | 85 ms
5,632 KB |
testcase_14 | AC | 85 ms
5,760 KB |
testcase_15 | AC | 89 ms
5,760 KB |
testcase_16 | AC | 90 ms
5,632 KB |
testcase_17 | AC | 87 ms
5,760 KB |
testcase_18 | AC | 88 ms
5,760 KB |
testcase_19 | AC | 88 ms
5,632 KB |
testcase_20 | AC | 84 ms
5,632 KB |
testcase_21 | AC | 87 ms
5,632 KB |
testcase_22 | AC | 85 ms
5,504 KB |
testcase_23 | AC | 62 ms
5,632 KB |
testcase_24 | AC | 77 ms
5,632 KB |
testcase_25 | AC | 70 ms
5,632 KB |
testcase_26 | AC | 62 ms
5,632 KB |
testcase_27 | AC | 32 ms
5,248 KB |
testcase_28 | AC | 3 ms
5,248 KB |
ソースコード
#include "bits/stdc++.h"#include <random>#include <chrono>#define ALL(x) (x).begin(), (x).end()#define RALL(x) (x).rbegin(), (x).rend()#define SZ(x) ((lint)(x).size())#define FOR(i, begin, end) for(lint i=(begin),i##_end_=(end);i<i##_end_;++i)#define IFOR(i, begin, end) for(lint i=(end)-1,i##_begin_=(begin);i>=i##_begin_;--i)#define REP(i, n) FOR(i,0,n)#define IREP(i, n) IFOR(i,0,n)#define endk '\n'using namespace std; typedef unsigned long long _ulong; typedef long long int lint; typedef double ld; typedef pair<lint, lint> plint; typedef pair<ld, ld> pld;struct fast_ios { fast_ios() { cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(30); }; } fast_ios_;template<class T> auto add = [](T a, T b) -> T { return a + b; };template<class T> auto mul = [](T a, T b) -> T { return a * b; };template<class T> auto f_max = [](T a, T b) -> T { return max(a, b); };template<class T> auto f_min = [](T a, T b) -> T { return min(a, b); };template<class T> using V = vector<T>;using Vl = V<lint>; using VVl = V<Vl>; using VVVl = V<V<Vl>>;template< typename T > ostream& operator<<(ostream& os, const vector< T >& v) {for (int i = 0; i < (int)v.size(); i++) os << v[i] << (i + 1 != v.size() ? " " : "");return os;}template< typename T >istream& operator>>(istream& is, vector< T >& v) {for (T& in : v) is >> in;return is;}template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }template <class T>T div_floor(T a, T b) {if (b < 0) a *= -1, b *= -1;return a >= 0 ? a / b : (a + 1) / b - 1;}template <class T>T div_ceil(T a, T b) {if (b < 0) a *= -1, b *= -1;return a > 0 ? (a - 1) / b + 1 : a / b;}template <class F> struct rec {F f;rec(F&& f_) : f(std::forward<F>(f_)) {}template <class... Args> auto operator()(Args &&... args) const {return f(*this, std::forward<Args>(args)...);}};lint gcd(lint a, lint b) { if (b == 0) return a; else return gcd(b, a % b); }lint digit(lint a) { return (lint)log10(a); }lint e_dist(plint a, plint b) { return abs(a.first - b.first) * abs(a.first - b.first) + abs(a.second - b.second) * abs(a.second - b.second); }lint m_dist(plint a, plint b) { return abs(a.first - b.first) + abs(a.second - b.second); }bool check_overflow(lint a, lint b, lint limit) { if (b == 0) return false; return a > limit / b; } // a * b > c => truevoid Worshall_Floyd(VVl& g) { REP(k, SZ(g)) REP(i, SZ(g)) REP(j, SZ(g)) chmin(g[i][j], g[i][k] + g[k][j]); }const long long MOD1000000007 = 1000000007, MOD998244353 = 998244353, INF = 1e18;lint dx[8] = { 0, 1, 0, -1, 1, -1, 1, -1 }, dy[8] = { 1, 0, -1, 0, -1, -1, 1, 1 };bool YN(bool flag) { cout << (flag ? "YES" : "NO") << endk; return flag; } bool yn(bool flag) { cout << (flag ? "Yes" : "No") << endk; return flag; }struct Edge {lint from, to;lint cost;Edge() {}Edge(lint u, lint v, lint c) {cost = c;from = u;to = v;}bool operator<(const Edge& e) const {return cost < e.cost;}};struct WeightedEdge {lint to;lint cost;WeightedEdge(lint v, lint c) {to = v;cost = c;}bool operator<(const WeightedEdge& e) const {return cost < e.cost;}};using WeightedGraph = V<V<WeightedEdge>>;typedef pair<lint, plint> tlint;typedef pair<ld, ld> pld;typedef pair<plint, plint> qlint;typedef pair<lint, string> vstr;typedef pair<string, string> pstr;typedef pair<set<lint>, set<lint>> pset;struct UnionFind {public:UnionFind() : _n(0) {}UnionFind(int n) : _n(n), parent_or_size(n, -1) {}int merge(int a, int b) {assert(0 <= a && a < _n);assert(0 <= b && b < _n);int x = leader(a), y = leader(b);if (x == y) return x;if (-parent_or_size[x] < -parent_or_size[y]) std::swap(x, y);if (used_count) {if (count_in_set[x].size() < count_in_set[y].size()) {std::swap(count_in_set[x], count_in_set[y]);}for (auto p : count_in_set[y]) {count_in_set[x][p.first] += p.second;}}if (set_operate) {root_values[x] = f(root_values[y], root_values[x]);}parent_or_size[x] += parent_or_size[y];parent_or_size[y] = x;return x;}bool same(int a, int b) {assert(0 <= a && a < _n);assert(0 <= b && b < _n);return leader(a) == leader(b);}int leader(int a) {assert(0 <= a && a < _n);if (parent_or_size[a] < 0) return a;return parent_or_size[a] = leader(parent_or_size[a]);}int size(int a) {assert(0 <= a && a < _n);return -parent_or_size[leader(a)];}std::vector<std::vector<int>> groups() {std::vector<int> leader_buf(_n), group_size(_n);for (int i = 0; i < _n; i++) {leader_buf[i] = leader(i);group_size[leader_buf[i]]++;}std::vector<std::vector<int>> result(_n);for (int i = 0; i < _n; i++) {result[i].reserve(group_size[i]);}for (int i = 0; i < _n; i++) {result[leader_buf[i]].push_back(i);}result.erase(std::remove_if(result.begin(), result.end(),[&](const std::vector<int>& v) { return v.empty(); }),result.end());return result;}//update root calc//set by set operationsvoid set_operate_and_value(std::vector<lint> array, function<lint(lint, lint)> _f) {f = _f;root_values = array;set_operate = true;}lint get_set_value(int a) {return root_values[leader(a)];}//regist countvoid regist_count(int a, int label) {if (!used_count) {used_count = true;count_in_set.assign(_n, std::map<int, int>());}count_in_set[leader(a)][label]++;}int get_count(int a, int label) {if (!used_count) return -1;return count_in_set[leader(a)][label];}private:int _n;std::vector<int> parent_or_size;std::vector<std::map<int, int>> count_in_set;bool used_count = false;std::vector<lint> root_values;function<lint(lint, lint)> f;bool set_operate = false;};int main() {lint N, Q;cin >> N >> Q;Vl arr(N);cin >> arr;UnionFind tree(N);REP(i, N) {if (arr[i] == -1) continue;tree.merge(arr[i] - 1, i);}REP(i, Q) {lint a, b;cin >> a >> b; a--; b--;yn(tree.same(a, b));}}