結果
| 問題 |
No.1678 Coin Trade (Multiple)
|
| コンテスト | |
| ユーザー |
ei1333333
|
| 提出日時 | 2021-09-10 22:39:20 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 1,450 ms / 5,000 ms |
| コード長 | 5,282 bytes |
| コンパイル時間 | 2,368 ms |
| コンパイル使用メモリ | 213,028 KB |
| 最終ジャッジ日時 | 2025-01-24 11:45:29 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 56 |
ソースコード
#include<bits/stdc++.h>
using namespace std;
using int64 = long long;
//const int mod = 1e9 + 7;
const int mod = 998244353;
const int64 infll = (1LL << 62) - 1;
const int inf = (1 << 30) - 1;
struct IoSetup {
IoSetup() {
cin.tie(nullptr);
ios::sync_with_stdio(false);
cout << fixed << setprecision(10);
cerr << fixed << setprecision(10);
}
} iosetup;
template< typename T1, typename T2 >
ostream &operator<<(ostream &os, const pair< T1, T2 > &p) {
os << p.first << " " << p.second;
return os;
}
template< typename T1, typename T2 >
istream &operator>>(istream &is, pair< T1, T2 > &p) {
is >> p.first >> p.second;
return is;
}
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< typename T1, typename T2 >
inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
template< typename T1, typename T2 >
inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }
template< typename T = int64 >
vector< T > make_v(size_t a) {
return vector< T >(a);
}
template< typename T, typename... Ts >
auto make_v(size_t a, Ts... ts) {
return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...));
}
template< typename T, typename V >
typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) {
t = v;
}
template< typename T, typename V >
typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) {
for(auto &e: t) fill_v(e, v);
}
template< typename F >
struct FixPoint : F {
FixPoint(F &&f) : F(forward< F >(f)) {}
template< typename... Args >
decltype(auto) operator()(Args &&... args) const {
return F::operator()(*this, forward< Args >(args)...);
}
};
template< typename F >
inline decltype(auto) MFP(F &&f) {
return FixPoint< F >{forward< F >(f)};
}
template< typename CapType, typename CostType >
class MinCostFlowDAG {
public:
using Cat = CapType;
using Cot = CostType;
using pti = pair< Cot, int >;
struct edge {
int to, rev;
Cat cap;
Cot cost;
};
const int V;
const Cot inf;
vector< vector< edge > > G;
vector< Cot > h, dist;
vector< int > deg, ord, prevv, preve;
MinCostFlowDAG(const int node_size) : V(node_size), inf(numeric_limits< Cot >::max()),
G(V), h(V, inf), dist(V), deg(V, 0), prevv(V), preve(V) {}
void add_edge(const int from, const int to, const Cat cap, const Cot cost) {
if(cap == 0) return;
G[from].push_back((edge) {to, (int) G[to].size(), cap, cost});
G[to].push_back((edge) {from, (int) G[from].size() - 1, 0, -cost});
++deg[to];
}
bool tsort() {
queue< int > que;
for(int i = 0; i < V; ++i) {
if(deg[i] == 0) que.push(i);
}
while(!que.empty()) {
const int p = que.front();
que.pop();
ord.push_back(p);
for(auto &e: G[p]) {
if(e.cap > 0 && --deg[e.to] == 0) que.push(e.to);
}
}
return (*max_element(deg.begin(), deg.end()) == 0);
}
void calc_potential(const int s) {
h[s] = 0;
for(const int v: ord) {
if(h[v] == inf) continue;
for(const edge &e: G[v]) {
if(e.cap > 0) h[e.to] = min(h[e.to], h[v] + e.cost);
}
}
}
void Dijkstra(const int s) {
priority_queue< pti, vector< pti >, greater< pti > > que;
fill(dist.begin(), dist.end(), inf);
dist[s] = 0;
que.push(pti(0, s));
while(!que.empty()) {
pti p = que.top();
que.pop();
const int v = p.second;
if(dist[v] < p.first) continue;
for(int i = 0; i < (int) G[v].size(); ++i) {
edge &e = G[v][i];
if(e.cap > 0 && dist[e.to] > dist[v] + e.cost + h[v] - h[e.to]) {
dist[e.to] = dist[v] + e.cost + h[v] - h[e.to];
prevv[e.to] = v, preve[e.to] = i;
que.push(pti(dist[e.to], e.to));
}
}
}
}
void update(const int s, const int t, Cat &f, Cot &res) {
for(int i = 0; i < V; i++) {
if(dist[i] != inf) h[i] += dist[i];
}
Cat d = f;
for(int v = t; v != s; v = prevv[v]) {
d = min(d, G[prevv[v]][preve[v]].cap);
}
f -= d;
res += h[t] * d;
for(int v = t; v != s; v = prevv[v]) {
edge &e = G[prevv[v]][preve[v]];
e.cap -= d;
G[v][e.rev].cap += d;
}
}
Cot solve(const int s, const int t, Cat f) {
if(!tsort()) assert(false); // not DAG
calc_potential(s);
Cot res = 0;
while(f > 0) {
Dijkstra(s);
if(dist[t] == inf) return -1;
update(s, t, f, res);
}
return res;
}
};
int main() {
int N, K;
cin >> N >> K;
MinCostFlowDAG< int, int64 > mcf(N + N + 2);
const int S = N + N;
const int T = N + N + 1;
for(int i = 0; i < N; i++) {
int a, m;
cin >> a >> m;
mcf.add_edge(i == 0 ? S : N + i, i, K, a);
for(int j = 0; j < m; j++) {
int b;
cin >> b;
--b;
mcf.add_edge(b, i, 1, 0);
}
mcf.add_edge(i, i + 1 == N ? T : N + i + 1, K, -a);
mcf.add_edge(N + i, i + 1 == N ? T : N + i + 1, K, 0);
}
cout << -mcf.solve(S, T, K) << "\n";
}
ei1333333