結果
| 問題 | No.1615 Double Down |
| ユーザー |
 hitonanode
|
| 提出日時 | 2021-08-17 02:28:49 |
| 言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 5,120 bytes |
| コンパイル時間 | 1,400 ms |
| コンパイル使用メモリ | 91,252 KB |
| 実行使用メモリ | 12,464 KB |
| 最終ジャッジ日時 | 2024-10-10 01:45:59 |
| 合計ジャッジ時間 | 35,421 ms |
|
ジャッジサーバーID （参考情報） |
judge1 / judge2 |
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テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 6,401 ms
6,376 KB |
| testcase_01 | AC | 8,675 ms
6,508 KB |
| testcase_02 | TLE | - |
| testcase_03 | -- | - |
| testcase_04 | -- | - |
| testcase_05 | -- | - |
| testcase_06 | -- | - |
| testcase_07 | -- | - |
| testcase_08 | -- | - |
| testcase_09 | -- | - |
| testcase_10 | -- | - |
| testcase_11 | -- | - |
| testcase_12 | -- | - |
| testcase_13 | -- | - |
| testcase_14 | -- | - |
| testcase_15 | -- | - |
| testcase_16 | -- | - |
| testcase_17 | -- | - |
| testcase_18 | -- | - |
| testcase_19 | -- | - |
| testcase_20 | -- | - |
| testcase_21 | -- | - |
| testcase_22 | -- | - |
| testcase_23 | -- | - |
| testcase_24 | -- | - |
| testcase_25 | -- | - |
| testcase_26 | -- | - |
| testcase_27 | -- | - |
| testcase_28 | -- | - |
| testcase_29 | -- | - |
| testcase_30 | -- | - |
| testcase_31 | -- | - |
| testcase_32 | -- | - |
| testcase_33 | -- | - |
| testcase_34 | -- | - |
| testcase_35 | -- | - |
| testcase_36 | -- | - |
| testcase_37 | -- | - |
| testcase_38 | -- | - |
| testcase_39 | -- | - |
| testcase_40 | -- | - |
| testcase_41 | -- | - |
| testcase_42 | -- | - |
| testcase_43 | -- | - |
| testcase_44 | -- | - |
| testcase_45 | -- | - |
| testcase_46 | -- | - |
| testcase_47 | -- | - |
| testcase_48 | -- | - |
| testcase_49 | -- | - |
| testcase_50 | -- | - |
| testcase_51 | -- | - |
| testcase_52 | -- | - |
| testcase_53 | -- | - |
| testcase_54 | -- | - |
| testcase_55 | -- | - |
| testcase_56 | -- | - |
ソースコード
#line 1 "combinatorial_opt/test/mcf_costscaling.yuki1615.test.cpp"
#define PROBLEM "https://yukicoder.me/problems/no/1615"
#line 2 "data_structure/light_forward_list.hpp"
#include <vector>
// CUT begin
// Simple forward_list for MLE-sensitive situations
// Verify: <http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=ALDS1_14_D>
template <typename T> struct light_forward_list {
static std::vector<unsigned> ptr;
static std::vector<T> val;
unsigned head;
light_forward_list() : head(0) {}
void push_front(T x) {
ptr.push_back(head), val.push_back(x);
head = ptr.size() - 1;
}
struct iterator {
unsigned p;
iterator operator++() { return {p = ptr[p]}; }
T &operator*() { return val[p]; }
bool operator!=(const iterator &rhs) { return p != rhs.p; }
};
iterator begin() { return {head}; }
iterator end() { return {0}; }
};
template <typename T> std::vector<unsigned> light_forward_list<T>::ptr = {0};
template <typename T> std::vector<T> light_forward_list<T>::val = {T()};
#line 3 "combinatorial_opt/mcf_costscaling.hpp"
#include <cassert>
#include <deque>
#include <limits>
// Cost scaling
// https://people.orie.cornell.edu/dpw/orie633/
// Implementation idea: https://yukicoder.me/submissions/680169
template <class Cap, class Cost> struct mcf_costscaling {
mcf_costscaling() = default;
mcf_costscaling(int n) : _n(n), to(n), b(n), p(n) {
static_assert(std::numeric_limits<Cap>::max() > 0, "max() must be greater than 0");
}
int _n;
std::vector<Cap> cap;
std::vector<Cost> cost;
std::vector<int> opposite;
std::vector<light_forward_list<int>> to;
std::vector<Cap> b;
std::vector<Cost> p;
void add_edge(int from_, int to_, Cap cap_, Cost cost_) {
assert(0 <= from_ && from_ < _n);
assert(0 <= to_ && to_ < _n);
assert(0 <= cap_);
assert(0 <= cost_);
cost_ *= (_n + 1);
int e = int(cap.size());
to[from_].push_front(e);
cap.push_back(cap_);
cost.push_back(cost_);
opposite.push_back(to_);
to[to_].push_front(e + 1);
cap.push_back(0);
cost.push_back(-cost_);
opposite.push_back(from_);
}
void add_supply(int v, Cap supply) { b[v] += supply; }
void add_demand(int v, Cap demand) { add_supply(v, -demand); }
Cost flow(int SCALING = 1) {
Cost eps = 1;
for (const auto c : cost) {
while (eps <= -c) eps <<= SCALING;
}
for (; eps >>= SCALING;) {
for (int e = 0; e < int(cap.size()); e += 2) {
const int i = opposite[e ^ 1], j = opposite[e];
const Cost cp_ij = cost[e] + p[i] - p[j];
if (cap[e] and cp_ij < 0) {
b[i] -= cap[e], b[j] += cap[e], cap[e ^ 1] += cap[e], cap[e] = 0;
} else if (cap[e ^ 1] and cp_ij > 0) {
b[i] += cap[e ^ 1], b[j] -= cap[e ^ 1], cap[e] += cap[e ^ 1], cap[e ^ 1] = 0;
}
}
std::deque<int> q;
for (int i = 0; i < _n; i++) {
if (b[i] > 0) q.push_back(i);
}
while (q.size()) {
const int i = q.front();
q.pop_front();
for (auto e : to[i]) { // Push
if (!cap[e]) continue;
int j = opposite[e];
Cost cp_ij = cost[e] + p[i] - p[j];
if (cp_ij >= 0) continue;
Cap f = b[i] > cap[e] ? cap[e] : b[i];
if (b[j] <= 0 and b[j] + f > 0) q.push_back(j);
b[i] -= f, b[j] += f, cap[e] -= f, cap[e ^ 1] += f;
if (!b[i]) break;
}
if (b[i] > 0) { // Relabel
bool flg = false;
for (int e : to[i]) {
if (!cap[e]) continue;
Cost x = p[opposite[e]] - cost[e] - eps;
if (!flg or x > p[i]) flg = true, p[i] = x;
}
q.push_back(i);
}
}
}
Cost ret = 0;
for (int e = 0; e < int(cap.size()); e += 2) ret += cost[e] * cap[e ^ 1];
return ret / (_n + 1);
}
};
#line 3 "combinatorial_opt/test/mcf_costscaling.yuki1615.test.cpp"
#include <iostream>
using namespace std;
int main() {
int N, M, K, L;
cin >> N >> M >> K >> L;
mcf_costscaling<int, long long> mcf(N + M + 2);
long long ret = 0;
for (int l = 0; l < L; l++) {
int x, y, z;
cin >> x >> y >> z;
x--, y--;
mcf.add_supply(y + N, 1);
mcf.add_demand(x, 1);
mcf.add_edge(y + N, x, 1, 1LL << z);
ret += 1LL << z;
}
const int gs = N + M, gt = gs + 1;
for (int i = 0; i < N; i++) mcf.add_edge(gs, i, 1, 0);
for (int j = 0; j < M; j++) mcf.add_edge(N + j, gt, 1, 0);
mcf.add_edge(gs, gt, N + M, 0);
mcf.add_supply(gs, N + M);
mcf.add_demand(gt, N + M);
cout << ret - mcf.flow(2) << '\n';
}