結果
問題 | No.2695 Warp Zone |
ユーザー |
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提出日時 | 2024-03-22 22:02:21 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 1,515 ms / 2,000 ms |
コード長 | 3,891 bytes |
コンパイル時間 | 4,984 ms |
コンパイル使用メモリ | 277,980 KB |
実行使用メモリ | 52,652 KB |
最終ジャッジ日時 | 2024-09-30 11:33:32 |
合計ジャッジ時間 | 17,344 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 24 |
ソースコード
#include<bits/stdc++.h>#include<atcoder/all>using namespace std;using int64 = long long;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 {explicit 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)};}int main() {int H, W, N;cin >> H >> W >> N;vector< int > A(N), B(N), C(N), D(N);vector< int > ys, xs;for(int i = 0; i < N; i++) {cin >> A[i] >> B[i] >> C[i] >> D[i];--A[i], --B[i], --C[i], --D[i];ys.emplace_back(A[i]);xs.emplace_back(B[i]);ys.emplace_back(C[i]);xs.emplace_back(D[i]);}ys.emplace_back(0);ys.emplace_back(H - 1);xs.emplace_back(0);xs.emplace_back(W - 1);sort(ys.begin(), ys.end());sort(xs.begin(), xs.end());ys.erase(unique(ys.begin(), ys.end()), ys.end());xs.erase(unique(xs.begin(), xs.end()), xs.end());auto mp = make_v< int >(ys.size(), xs.size());fill_v(mp, -1);for(int i = 0; i < N; i++) {A[i] = lower_bound(ys.begin(), ys.end(), A[i]) - ys.begin();B[i] = lower_bound(xs.begin(), xs.end(), B[i]) - xs.begin();C[i] = lower_bound(ys.begin(), ys.end(), C[i]) - ys.begin();D[i] = lower_bound(xs.begin(), xs.end(), D[i]) - xs.begin();mp[A[i]][B[i]] = i;}auto dp = make_v< int64 >(ys.size(), xs.size());fill_v(dp, infll);dp[0][0] = 0;using ti = tuple< int64, int, int >;priority_queue< ti, vector< ti >, greater<>> que;que.emplace(0, 0, 0);const int vy[] = {0, -1, 0, 1};const int vx[] = {-1, 0, 1, 0};while(not que.empty()) {auto [cost, y, x] = que.top();que.pop();if(dp[y][x] < cost) continue;if(~mp[y][x]) {int ny = C[mp[y][x]], nx = D[mp[y][x]];if (chmin(dp[ny][nx], cost + 1)) {que.emplace(dp[ny][nx], ny, nx);}}for(int i = 0; i < 4; i++) {int ny = y + vy[i];int nx = x + vx[i];if(ny < 0 or nx < 0 or ny >= ys.size() or nx >= xs.size()) {continue;}if(chmin(dp[ny][nx], cost + abs(ys[ny] - ys[y]) + abs(xs[nx] - xs[x]))) {que.emplace(dp[ny][nx], ny, nx);}}}cout << dp.back().back() << endl;}