結果
問題 | No.1390 Get together |
ユーザー |
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提出日時 | 2021-02-12 21:43:13 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 154 ms / 2,000 ms |
コード長 | 6,049 bytes |
コンパイル時間 | 3,711 ms |
コンパイル使用メモリ | 223,116 KB |
最終ジャッジ日時 | 2025-01-18 18:13:23 |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 29 |
ソースコード
#pragma GCC optimize("Ofast")#include "bits/stdc++.h"// Begin Header {{{using namespace std;#ifndef DEBUG#define dump(...)#endif#define all(x) begin(x), end(x)#define rall(x) rbegin(x), rend(x)#define rep(i, b, e) for (intmax_t i = (b), i##_limit = (e); i < i##_limit; ++i)#define repc(i, b, e) for (intmax_t i = (b), i##_limit = (e); i <= i##_limit; ++i)#define repr(i, b, e) for (intmax_t i = (b), i##_limit = (e); i >= i##_limit; --i)#define var(Type, ...) Type __VA_ARGS__; input(__VA_ARGS__)constexpr size_t operator""_zu(unsigned long long value) { return value; };constexpr intmax_t operator""_jd(unsigned long long value) { return value; };constexpr uintmax_t operator""_ju(unsigned long long value) { return value; };constexpr int INF = 0x3f3f3f3f;constexpr intmax_t LINF = 0x3f3f3f3f3f3f3f3f_jd;template <class T, class Compare = less<>>using MaxHeap = priority_queue<T, vector<T>, Compare>;template <class T, class Compare = greater<>>using MinHeap = priority_queue<T, vector<T>, Compare>;inline void input() {}template <class Head, class... Tail>inline void input(Head&& head, Tail&&... tail) {cin >> head;input(forward<Tail>(tail)...);}template <class Container, class Value = typename Container::value_type,enable_if_t<!is_same<Container, string>::value, nullptr_t> = nullptr>inline istream& operator>>(istream &is, Container &vs) {for (auto &v: vs) is >> v;return is;}template <class T, class U>inline istream& operator>>(istream &is, pair<T, U> &p) {is >> p.first >> p.second;return is;}inline void output() { cout << "\n"; }template <class Head, class... Tail>inline void output(Head&& head, Tail&&... tail) {cout << head;if (sizeof...(tail)) cout << " ";output(forward<Tail>(tail)...);}template <class Container, class Value = typename Container::value_type,enable_if_t<!is_same<Container, string>::value, nullptr_t> = nullptr>inline ostream& operator<<(ostream &os, const Container &vs) {static constexpr const char *delim[] = {" ", ""};for (auto it = begin(vs); it != end(vs); ++it) {os << delim[it == begin(vs)] << *it;}return os;}template <class Iterator>inline void join(const Iterator &Begin, const Iterator &End, const string &delim = "\n", const string &last = "\n") {for (auto it = Begin; it != End; ++it) {cout << ((it == Begin) ? "" : delim) << *it;}cout << last;}template <class T>inline vector<T> makeVector(const T &init_value, size_t sz) {return vector<T>(sz, init_value);}template <class T, class... Args>inline auto makeVector(const T &init_value, size_t sz, Args... args) {return vector<decltype(makeVector<T>(init_value, args...))>(sz, makeVector<T>(init_value, args...));}template <class Func>class FixPoint : Func {public:explicit constexpr FixPoint(Func&& f) noexcept : Func(forward<Func>(f)) {}template <class... Args>constexpr decltype(auto) operator()(Args&&... args) const {return Func::operator()(*this, std::forward<Args>(args)...);}};template <class Func>static inline constexpr decltype(auto) makeFixPoint(Func&& f) noexcept {return FixPoint<Func>{forward<Func>(f)};}template <class Container>struct reverse_t {Container &c;reverse_t(Container &c) : c(c) {}auto begin() { return c.rbegin(); }auto end() { return c.rend(); }};template <class Container>auto reversed(Container &c) {return reverse_t<Container>(c);}template <class T>inline bool chmax(T &a, const T &b) noexcept {return b > a && (a = b, true);}template <class T>inline bool chmin(T &a, const T &b) noexcept {return b < a && (a = b, true);}template <class T>inline T diff(const T &a, const T &b) noexcept {return a < b ? b - a : a - b;}void operator|=(vector<bool>::reference lhs, const bool rhs) {lhs = lhs | rhs;}void ioinit() {ios_base::sync_with_stdio(false);cin.tie(nullptr);cout << fixed << setprecision(10);cerr << fixed << setprecision(10);clog << fixed << setprecision(10);}// }}} End Header// DisjointSet {{{struct DisjointSet {const size_t n;mutable vector<int> c;explicit DisjointSet(const size_t n) : n(n), c(n, -1) {}size_t size(size_t v) const {assert(v < n);return -c[root(v)];}size_t root(size_t v) const {assert(v < n);return (c[v] < 0) ? v : c[v] = root(c[v]);}bool connected(size_t u, size_t v) const {assert(u < n);assert(v < n);return root(u) == root(v);}size_t unite(size_t u, size_t v) {assert(u < n);assert(v < n);u = root(u);v = root(v);if (u == v) return u;if (-c[u] < -c[v]) swap(u, v);c[u] += c[v];c[v] = u;return u;}vector<vector<size_t>> groups() {vector<size_t> roots(n), group_size(n);for (size_t i = 0; i < n; ++i) {roots[i] = root(i);group_size[roots[i]]++;}vector<vector<size_t>> res(n);for (size_t i = 0; i < n; ++i) {res[i].reserve(group_size[i]);}for (size_t i = 0; i < n; ++i) {res[roots[i]].emplace_back(i);}res.erase(remove_if(res.begin(), res.end(),[&](const auto& v) { return v.empty(); }),res.end());return res;}};// }}}int main() {ioinit();var(size_t, N, M);vector<vector<int>> box_by_color(N);vector<int> bs(N), cs(N);rep(i, 0, N) {input(bs[i], cs[i]);bs[i]--, cs[i]--;box_by_color[cs[i]].emplace_back(bs[i]);}DisjointSet ds(M);rep(c, 0, N) {rep(i, 1, box_by_color[c].size()) ds.unite(box_by_color[c][i - 1], box_by_color[c][i]);}const auto gs = ds.groups();int res = 0;for (const auto g: gs) {res += g.size() - 1;}output(res);return 0;}