結果
問題 | No.2563 色ごとのグループ |
ユーザー | shogo314 |
提出日時 | 2023-12-02 15:53:30 |
言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 161 ms / 2,000 ms |
コード長 | 8,670 bytes |
コンパイル時間 | 3,142 ms |
コンパイル使用メモリ | 259,136 KB |
実行使用メモリ | 13,440 KB |
最終ジャッジ日時 | 2024-09-26 19:27:52 |
合計ジャッジ時間 | 6,199 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 35 |
ソースコード
#line 2 "/home/shogo314/cpp_include/ou-library/io.hpp" /** * @file io.hpp * @brief 空白区切り出力、iostreamのオーバーロード */ #include <array> #include <iostream> #include <utility> #include <tuple> #include <vector> namespace tuple_io { template <typename Tuple, size_t I, typename CharT, typename Traits> std::basic_istream<CharT, Traits>& read_tuple(std::basic_istream<CharT, Traits>& is, Tuple& t) { is >> std::get<I>(t); if constexpr (I + 1 < std::tuple_size_v<Tuple>) { return read_tuple<Tuple, I + 1>(is, t); } return is; } template <typename Tuple, size_t I, typename CharT, typename Traits> std::basic_ostream<CharT, Traits>& write_tuple(std::basic_ostream<CharT, Traits>& os, const Tuple& t) { os << std::get<I>(t); if constexpr (I + 1 < std::tuple_size_v<Tuple>) { os << CharT(' '); return write_tuple<Tuple, I + 1>(os, t); } return os; } }; template <typename T1, typename T2, typename CharT, typename Traits> std::basic_istream<CharT, Traits>& operator>>(std::basic_istream<CharT, Traits>& is, std::pair<T1, T2>& p) { is >> p.first >> p.second; return is; } template <typename... Types, typename CharT, typename Traits> std::basic_istream<CharT, Traits>& operator>>(std::basic_istream<CharT, Traits>& is, std::tuple<Types...>& p) { return tuple_io::read_tuple<std::tuple<Types...>, 0>(is, p); } template <typename T, size_t N, typename CharT, typename Traits> std::basic_istream<CharT, Traits>& operator>>(std::basic_istream<CharT, Traits>& is, std::array<T, N>& a) { for(auto& e : a) is >> e; return is; } template <typename T, typename CharT, typename Traits> std::basic_istream<CharT, Traits>& operator>>(std::basic_istream<CharT, Traits>& is, std::vector<T>& v) { for(auto& e : v) is >> e; return is; } template <typename T1, typename T2, typename CharT, typename Traits> std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os, const std::pair<T1, T2>& p) { os << p.first << CharT(' ') << p.second; return os; } template <typename... Types, typename CharT, typename Traits> std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os, const std::tuple<Types...>& p) { return tuple_io::write_tuple<std::tuple<Types...>, 0>(os, p); } template <typename T, size_t N, typename CharT, typename Traits> std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os, const std::array<T, N>& a) { for(size_t i = 0; i < N; ++i) { if(i) os << CharT(' '); os << a[i]; } return os; } template <typename T, typename CharT, typename Traits> std::basic_ostream<CharT, Traits>& operator<<(std::basic_ostream<CharT, Traits>& os, const std::vector<T>& v) { for(size_t i = 0; i < v.size(); ++i) { if(i) os << CharT(' '); os << v[i]; } return os; } /** * @brief 空行出力 */ void print() { std::cout << '\n'; } /** * @brief 出力して改行 * * @tparam T 型 * @param x 出力する値 */ template <typename T> void print(const T& x) { std::cout << x << '\n'; } /** * @brief 空白区切りで出力して改行 * * @tparam T 1つ目の要素の型 * @tparam Tail 2つ目以降の要素の型 * @param x 1つ目の要素 * @param tail 2つ目以降の要素 */ template <typename T, typename... Tail> void print(const T& x, const Tail&... tail) { std::cout << x << ' '; print(tail...); } #line 2 "/home/shogo314/cpp_include/ou-library/unionfind.hpp" /** * @file unionfind.hpp * @brief UnionFind */ #include <algorithm> #include <cassert> #line 11 "/home/shogo314/cpp_include/ou-library/unionfind.hpp" /** * @brief 無向グラフに対して「辺の追加」、「2頂点が連結かの判定」をする */ struct UnionFind { private: int _n; // 負ならサイズ、非負なら親 std::vector<int> parent_or_size; public: UnionFind() : _n(0) {} explicit UnionFind(int n) : _n(n), parent_or_size(n, -1) {} /** * @brief 辺(a,b)を足す * @return 連結したものの代表元 */ 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); parent_or_size[x] += parent_or_size[y]; parent_or_size[y] = x; return x; } /** * @brief 頂点a,bが連結かどうか */ bool same(int a, int b) { assert(0 <= a && a < _n); assert(0 <= b && b < _n); return leader(a) == leader(b); } /** * @brief 頂点aの属する連結成分の代表元 */ int leader(int a) { assert(0 <= a && a < _n); if (parent_or_size[a] < 0) return a; int x = a; while (parent_or_size[x] >= 0) { x = parent_or_size[x]; } while (parent_or_size[a] >= 0) { int t = parent_or_size[a]; parent_or_size[a] = x; a = t; } return x; } /** * @brief 頂点aの属する連結成分のサイズ */ int size(int a) { assert(0 <= a && a < _n); return -parent_or_size[leader(a)]; } /** * @brief グラフを連結成分に分け、その情報を返す * @return 「一つの連結成分の頂点番号のリスト」のリスト */ 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; } }; #line 1 "/home/shogo314/cpp_include/sh-library/base.hpp" #include <bits/stdc++.h> #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") using namespace std; using ll = long long; using str = string; using pl = pair<ll, ll>; template <typename T> using ml = map<ll, T>; using mll = map<ll, ll>; using sl = set<ll>; using ld = long double; using pd = pair<ld, ld>; template <typename T> using vec = vector<T>; template <typename T> using vv = vector<vector<T>>; template <typename T> using vvv = vector<vector<vector<T>>>; template <typename T1, typename T2> using vp = vector<pair<T1, T2>>; using vl = vec<ll>; using vvl = vv<ll>; using vs = vec<str>; using vc = vec<char>; using vpl = vec<pl>; using spl = set<pl>; using vd = vec<ld>; using vpd = vec<pd>; template <typename T, int N> using ary = array<T, N>; template <int N> using al = array<ll, N>; template <int N1, int N2> using aal = array<array<ll, N2>, N1>; template <int N> using val = vec<al<N>>; #define all(obj) (obj).begin(), (obj).end() #define reps(i, a, n) for (ll i = (a); i < ll(n); i++) #define rep(i, n) reps(i, 0, (n)) #define rrep(i, n) reps(i, 1, (n) + 1) #define repds(i, a, n) for (ll i = ((n) - 1); i >= (a); i--) #define repd(i, n) repds(i, 0, (n)) #define rrepd(i, n) repds(i, 1, (n) + 1) #define rep2(i, j, x, y) rep(i, x) rep(j, y) template <typename T1, typename T2> inline bool chmin(T1 &a, T2 b) { if (a > b) { a = b; return true; } return false; } template <typename T1, typename T2> inline bool chmax(T1 &a, T2 b) { if (a < b) { a = b; return true; } return false; } #define LL(x) ll x;cin >> x; #define VL(a,n) vl a(n);cin >> a; #define VS(a,n) vs a(n);cin >> a; #define STR(s) str s;cin >> s; #define VPL(a,n) vpl a(n);cin >> a; #define VAL(a,n,k) val<k> a(n);cin >> a; #line 4 "main.cpp" void solve() { LL(N); LL(M); VL(C, N); UnionFind uf(N); rep(i, M) { LL(u); LL(v); u--; v--; if (C[u] == C[v]) uf.merge(u, v); } mll m; ll ans = 0; rep(i, N) { if (m.find(C[i]) == m.end()) { m[C[i]] = i; } else { if (not uf.same(m[C[i]], i)) { uf.merge(m[C[i]], i); ans++; } } } print(ans); } int main() { cin.tie(nullptr); ios_base::sync_with_stdio(false); solve(); }