結果
| 問題 | No.1316 Maximum Minimum Spanning Tree |
| コンテスト | |
| ユーザー |
opt
|
| 提出日時 | 2020-10-22 02:50:07 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 5,124 bytes |
| 記録 | |
| コンパイル時間 | 2,361 ms |
| コンパイル使用メモリ | 205,848 KB |
| 最終ジャッジ日時 | 2025-01-15 12:25:15 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 WA * 1 |
| other | AC * 16 WA * 62 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define rep2(i, m, n) for (int i = (m); i < (n); ++i)
#define rep(i, n) rep2(i, 0, n)
#define drep2(i, m, n) for (int i = (m)-1; i >= (n); --i)
#define drep(i, n) drep2(i, n, 0)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#ifdef LOCAL
void debug_out() { cerr << endl; }
template <class Head, class... Tail> void debug_out(Head H, Tail... T) { cerr << ' ' << H; debug_out(T...); }
#define debug(...) cerr << 'L' << __LINE__ << " [" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)
#define dump(x) cerr << 'L' << __LINE__ << " " << #x << " = " << (x) << endl
#else
#define debug(...) (void(0))
#define dump(x) (void(0))
#endif
template<class T> using V = vector<T>;
template<class T> using P = pair<T, T>;
using ll = long long;
using ld = long double;
using Vi = V<int>; using VVi = V<Vi>;
using Vl = V<ll>; using VVl = V<Vl>;
using Vd = V<ld>; using VVd = V<Vd>;
using Vb = V<bool>; using VVb = V<Vb>;
using Pi = P<int>;
using Pl = P<ll>;
using Pd = P<ld>;
template<class T> using priority_queue_rev = priority_queue<T, vector<T>, greater<T>>;
template<class T> vector<T> make_vec(size_t n, T a) { return vector<T>(n, a); }
template<class... Ts> auto make_vec(size_t n, Ts... ts) { return vector<decltype(make_vec(ts...))>(n, make_vec(ts...)); }
template<class T> inline int sz(const T &x) { return size(x); }
template<class T> inline bool chmin(T &a, const T b) { if (a > b) { a = b; return true; } return false; }
template<class T> inline bool chmax(T &a, const T b) { if (a < b) { a = b; return true; } return false; }
template<class T1, class T2> istream &operator>>(istream &is, pair<T1, T2> &p) { is >> p.first >> p.second; return is; }
template<class T1, class T2> ostream &operator<<(ostream &os, const pair<T1, T2> &p) { os << '(' << p.first << ", " << p.second << ')'; return os; }
template<class T> istream &operator>>(istream &is, vector<T> &v) { for (auto &e : v) is >> e; return is; }
template<class T> ostream &operator<<(ostream &os, const vector<T> &v) { for (auto &e : v) os << e << ' '; return os; }
template<class T, size_t n> istream &operator>>(istream &is, array<T, n> &v) { for (auto &e : v) is >> e; return is; }
template<class T, size_t n> ostream &operator<<(ostream &os, const array<T, n> &v) { for (auto &e : v) os << e << ' '; return os; }
template<class T> inline void deduplicate(vector<T> &a) { sort(all(a)); a.erase(unique(all(a)), a.end()); }
template<class T> inline int count_between(const vector<T> &a, T l, T r) { return lower_bound(all(a), r) - lower_bound(all(a), l); } // [l, r)
inline ll cDiv(const ll x, const ll y) { return (x+y-1) / y; } // ceil(x/y)
inline int fLog2(const ll x) { assert(x > 0); return 63-__builtin_clzll(x); } // floor(log2(x))
inline int cLog2(const ll x) { assert(x > 0); return (x == 1) ? 0 : 64-__builtin_clzll(x-1); } // ceil(log2(x))
inline int popcount(const ll x) { return __builtin_popcountll(x); }
inline void fail() { cout << -1 << '\n'; exit(0); }
struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_;
// const int INF = (1<<30) - 1;
// const ll INFll = (1ll<<60) - 1;
// const ld EPS = 1e-10;
// const ld PI = acos(-1.0);
struct edge {
int a, b;
ll c, d;
ld x;
};
struct UnionFind {
vector<int> d;
UnionFind(int n=0): d(n, -1) {}
int find(int x) {
if (d[x] < 0) return x;
return d[x] = find(d[x]);
}
bool unite(int x, int y) {
x = find(x); y = find(y);
if (x == y) return false;
if (d[x] > d[y]) swap(x,y);
d[x] += d[y];
d[y] = x;
return true;
}
bool same(int x, int y) { return find(x) == find(y);}
int size(int x) { return -d[find(x)];}
};
int main() {
chrono::system_clock::time_point start, now;
ll n, m, D; cin >> n >> m >> D;
ll ansmax = 0;
vector<edge> E(m);
for (auto &[a, b, c, d, x] : E) {
cin >> a >> b >> c >> d;
--a, --b;
x = 0;
ansmax += c * min(d, D);
}
ld etamin = 1e-3;
ld etamax = 1e0;
ld eta = etamin;
ld fpre = 0;
ll ans = 0;
vector<edge> Ebest;
start = chrono::system_clock::now();
const int T = 1e8;
rep(t, T) {
sort(begin(E), end(E), [](const auto &a, const auto &b) { return a.c + a.x < b.c + b.x; });
UnionFind uf(n);
ld f = 0;
for (auto &[a, b, c, d, x] : E) {
if (uf.unite(a, b)) f += D * (c + x);
f -= d * x;
}
if (chmax(ans, llround(f + 0.4))) Ebest = E;
if (f < fpre) eta *= 0.9;
else eta *= 1.1;
eta = clamp(eta, etamin, etamax);
uf = UnionFind(n);
for (auto &[a, b, c, d, x] : E) {
if (uf.unite(a, b)) x += eta * D;
x -= eta * d;
chmax(x, ld(0));
}
fpre = f;
if (t % 100000 == 0) debug(t, ans, f, eta);
if (ans > ansmax) fail();
now = chrono::system_clock::now();
auto dur = std::chrono::duration_cast<std::chrono::milliseconds>(now - start).count();
// debug(dur);
if (dur > 1800) {
// debug(t, ans, fi, f, eta);
cout << ans << '\n';
break;
}
}
for (auto &[a, b, c, d, x] : Ebest) debug(a, b, c, d, round(x), x);
}
opt