結果
問題 | No.2328 Build Walls |
ユーザー | coindarw |
提出日時 | 2023-05-28 15:53:26 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 4,900 bytes |
コンパイル時間 | 4,747 ms |
コンパイル使用メモリ | 270,196 KB |
実行使用メモリ | 146,016 KB |
最終ジャッジ日時 | 2024-06-08 08:48:21 |
合計ジャッジ時間 | 9,783 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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 | 2 ms
10,624 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 2 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 3 ms
5,376 KB |
testcase_09 | AC | 2 ms
5,376 KB |
testcase_10 | AC | 3 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,248 KB |
testcase_13 | TLE | - |
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 | -- | - |
ソースコード
#include <bits/stdc++.h> #include <atcoder/all> using ll = long long; #define rep(i, n) for (int i = 0, i##_len = (n); i < i##_len; ++i) #define reps(i, n) for (int i = 1, i##_len = (n); i <= i##_len; ++i) #define rrep(i, n) for (int i = ((int)(n)-1); i >= 0; --i) #define rreps(i, n) for (int i = ((int)(n)); i > 0; --i) #define rep2(i, s, n) for (int i = (s); i < (int)(n); ++i) #define repc2(i, s, n) for (int i = (s); i <= (int)(n); ++i) constexpr int inf = 2000'000'000; constexpr ll linf = 4000000000000000000ll; constexpr ll M7 = 1000000007ll; constexpr ll M09 = 1000000009ll; constexpr ll M9 = 998244353ll; #define all(v) begin(v), end(v) #define rall(v) rbegin(v), rend(v) using namespace std; using namespace atcoder; template <typename T> inline ostream& operator<<(ostream& os, vector<T>& v) { for (auto& e : v) os << e << " "; return os; } template <typename T, typename U> std::ostream& operator<<(std::ostream& os, const std::pair<T, U>& p) noexcept { return os << "(" << p.first << ", " << p.second << ")"; } #ifdef ONLINE_JUDGE #define debug(...) #else #define debug(...) cerr << "<" << #__VA_ARGS__ << ">: ", debug_out(__VA_ARGS__) template <typename T> void debug_out(T t) { cerr << t << endl; } template <typename T, typename... Args> void debug_out(T t, Args... args) { cerr << t << ", "; debug_out(args...); } #endif template <typename Cap> class MaxFlow { protected: int V; struct edge { int to; Cap cap; int rev; Cap flow = Cap(0); edge(int to, Cap cap, int rev) : to(to), cap(cap), rev(rev) {} }; void bfs(int s) { std::fill(begin(level), end(level), -1); std::queue<int> q; level.at(s) = 0; q.push(s); while (!q.empty()) { int v = q.front(); q.pop(); for (edge& e : G.at(v)) { // for (int i = 0; i < int(G.at(v).size()); i++) { // edge &e = G.at(v).at(i); if (e.cap > 0 && level.at(e.to) < 0) { level.at(e.to) = level.at(v) + 1; q.push(e.to); } } } } Cap dfs(int v, int t, Cap f) { if (v == t) return f; for (int& i = iter.at(v); i < int(G.at(v).size()); i++) { edge& e = G.at(v).at(i); if (e.cap > Cap(0) && level.at(v) < level.at(e.to)) { Cap d = dfs(e.to, t, ((f < e.cap) ? f : e.cap)); if (d > 0) { e.cap -= d; G.at(e.to).at(e.rev).cap += d; return d; } } } return Cap(0); } std::vector<std::vector<edge>> G; std::vector<int> iter, level; public: MaxFlow(int v) : V(v) { G = std::vector<std::vector<edge>>(v); iter = std::vector<int>(v); level = std::vector<int>(v); } Cap flow(int s, int t, Cap limit) { assert(0 <= s && s < V); assert(0 <= t && t < V); assert(limit >= Cap(0)); Cap _flow = Cap(0); while (true) { bfs(s); if (level.at(t) < 0) return _flow; std::fill(begin(iter), end(iter), 0); Cap f; while ((f = dfs(s, t, limit)) > 0) { _flow += f; limit -= f; } } } Cap flow(int s, int t) { return flow(s, t, std::numeric_limits<Cap>::max()); } void add_edge(int from, int to, Cap cap) { assert(0 <= from && from < V); assert(0 <= to && to < V); assert(cap >= Cap(0)); G.at(from).push_back(edge(to, cap, G.at(to).size())); G.at(to).push_back(edge(from, Cap(0), G.at(from).size() - 1)); } }; int main() { ios_base::sync_with_stdio(false); cin.tie(NULL); int h, w; cin >> h >> w; vector<vector<int>> a = vector<vector<int>>(h - 2, vector<int>(w)); rep(i, h - 2) { rep(j, w) { cin >> a.at(i).at(j); if (a.at(i).at(j) == -1) a.at(i).at(j) = inf; } } int HW = (h - 2) * w; mf_graph<ll> mf(HW * 2 + 2); const int s = HW * 2, t = HW * 2 + 1; const int dx[] = {1, 0, -1, 0}; const int dy[] = {0, 1, 0, -1}; auto vert = [&](int y, int x) { return y * w + x; }; rep(y, h - 2) rep(x, w) { rep(k, 4) { int ny = y + dy[k], nx = x + dx[k]; if (ny < 0 || ny >= h - 2 || nx < 0 || nx >= w) continue; mf.add_edge(vert(y, x) + HW, vert(ny, nx), inf); } mf.add_edge(vert(y, x), vert(y, x) + HW, a.at(y).at(x)); } rep(i, w) { mf.add_edge(s, i, inf); mf.add_edge((h - 3) * w + i + HW, t, inf); } ll ans = mf.flow(s, t); if (ans >= inf) ans = -1; cout << ans << "\n"; return 0; }