結果
問題 | No.1917 LCMST |
ユーザー |
|
提出日時 | 2024-06-16 16:19:56 |
言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 588 ms / 4,000 ms |
コード長 | 3,181 bytes |
コンパイル時間 | 2,624 ms |
コンパイル使用メモリ | 158,432 KB |
実行使用メモリ | 69,228 KB |
最終ジャッジ日時 | 2024-06-16 16:20:25 |
合計ジャッジ時間 | 22,592 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge3 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 42 |
ソースコード
#include <algorithm> #include <cassert> #include <cstdio> #include <cstdlib> #include <cstring> #include <cmath> #include <iostream> #include <numeric> #include <vector> #include <map> #include <set> #include <queue> #include <ranges> #include <iomanip> using namespace std; using ll = long long; auto range(int n) { return views::iota(0, n); } template<class T, class U> ostream& operator<<(ostream& os, const pair<T, U>& p){ return os << "{" << p.first << ", " << p.second << "}"; } template<typename T> ostream& operator<<(ostream& os, const vector<T>& obj) { os << "{"; for (const auto& e : obj) os << e << ", "; return os << "}"; } template<typename T> ostream& operator<<(ostream& os, const set<T>& obj) { os << "set{"; for (const auto& e : obj) os << e << ", "; return os << "}"; } template<typename T, typename U> ostream& operator<<(ostream& os, const map<T, U>& obj) { os << "map{"; for (const auto& e : obj) os << e << ", "; return os << "}"; } #ifdef ONLINE_JUDGE #define dump(expr) ; #else #define dump(expr) { cerr << "\033[33m#L" << __LINE__ << ": " << expr << "\033[39m" << endl; } #endif struct UF { vector<int> data; UF(int n) : data(n, -1) {} int root(int x) { return data[x] < 0 ? x : data[x] = root(data[x]); } bool find(int x, int y) { return root(x) == root(y); } void uni(int x, int y) { x = root(x); y = root(y); if (x != y) { if (data[x] < data[y]) swap(x, y); data[x] += data[y]; data[y] = x; } } }; ll gcd(ll a, ll b) { return b ? gcd(b, a % b) : a; } ll lcm(ll a, ll b) { return a / gcd(a, b) * b; } ll solve() { int n; cin >> n; const int A = 100000; // const int A = 10; ll res = 0; vector<char> exists(A + 1); for ([[maybe_unused]] int i : range(n)) { ll x; cin >> x; if (exists[x]) res += x; exists[x] = 1; } vector<vector<ll>> buckets(A + 1); for (int g = 1; g <= A; ++g) { for (int i = g; i <= A; i += g) if (exists[i]) buckets[g].push_back(i); } // dump(buckets); vector<pair<ll, pair<ll, ll>>> edges; for (int g = 1; g <= A; ++g) if (buckets[g].size() > 1) { ll x0 = buckets[g][0]; for (ll x : buckets[g]) if (x != x0) edges.push_back({lcm(x0, x), {x0, x}}); } sort(edges.begin(), edges.end()); UF uf(A + 1); for (auto edge : edges) { ll w = edge.first; auto e = edge.second; if (!uf.find(e.first, e.second)) { res += w; uf.uni(e.first, e.second); dump(e.first << " -- " << e.second << " : " << w); } } return res; } ll brute() { int n; cin >> n; vector<ll> vs(n); for (int i : range(n)) cin >> vs[i]; UF uf(n); vector<pair<ll, pair<ll, ll>>> edges; for (int i : range(n)) for (int j : range(i)) { edges.push_back({lcm(vs[i], vs[j]), {i, j}}); } sort(edges.begin(), edges.end()); ll res = 0; for (auto edge : edges) { ll w = edge.first; auto e = edge.second; if (!uf.find(e.first, e.second)) { res += w; uf.uni(e.first, e.second); dump(vs[e.first] << " -- " << vs[e.second] << " : " << w); } } return res; } int main() { cout << fixed << setprecision(12); // cout << brute() << endl; cout << solve() << endl; }