結果
問題 | No.2786 RMQ on Grid Path |
ユーザー |
![]() |
提出日時 | 2024-06-15 15:18:49 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
TLE
(最新)
AC
(最初)
|
実行時間 | - |
コード長 | 7,588 bytes |
コンパイル時間 | 3,436 ms |
コンパイル使用メモリ | 234,036 KB |
最終ジャッジ日時 | 2025-02-21 22:51:56 |
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 31 TLE * 1 -- * 3 |
ソースコード
#include <bits/stdc++.h>#include <cassert>//#include <atcoder/all>using namespace std;#define lli int#define REP(i, s, n) for (lli i = s; i < n; i++)#define INF (1LL << 62)#define mp(a, b) make_pair(a, b)#define SORT(V) sort(V.begin(), V.end())#define PI (3.141592653589794)#define TO_STRING(VariableName) #VariableName#define LOG1(x) \if (DEBUG) \cout << TO_STRING(x) << "=" << x << " " << endl;#define LOG2(x, y) \if (DEBUG) \cout << TO_STRING(x) << "=" << x << " " << TO_STRING(y) << "=" << y << endl;#define LOG3(x, y, z) \if (DEBUG) \cout << TO_STRING(x) << "=" << x << " " << TO_STRING(y) << "=" << y << " " \<< TO_STRING(z) << "=" << z << endl;#define LOG4(w, x, y, z) \if (DEBUG) \cout << TO_STRING(w) << "=" << w << " " << TO_STRING(x) << "=" << x << " " \<< TO_STRING(y) << "=" << y << " " << TO_STRING(z) << "=" << z \<< endl;#define LOG5(w, x, y, z, a) \if (DEBUG) \cout << TO_STRING(w) << "=" << w << " " << TO_STRING(x) << "=" << x << " " \<< TO_STRING(y) << "=" << y << " " << TO_STRING(z) << "=" << z << " " \<< TO_STRING(a) << "=" << a << endl;#define LOG6(w, x, y, z, a, b) \if (DEBUG) \cout << TO_STRING(w) << "=" << w << " " << TO_STRING(x) << "=" << x << " " \<< TO_STRING(y) << "=" << y << " " << TO_STRING(z) << "=" << z << " " \<< TO_STRING(a) << "=" << a << " " << TO_STRING(b) << "=" << b \<< endl;#define overload6(a, b, c, d, e, f, g, ...) g#define LOG(...) \overload6(__VA_ARGS__, LOG6, LOG5, LOG4, LOG3, LOG2, LOG1)(__VA_ARGS__)template <class T> bool chmax(T &a, const T &b) {if (a < b) {a = b;return 1;}return 0;}template <class T> bool chmin(T &a, const T &b) {if (b < a) {a = b;return 1;}return 0;}mt19937 engine;std::chrono::system_clock::time_point start, endTime;// checker https://atcoder.jp/contests/abc264/tasks/abc264_estruct UnionFind {vector<int> par; // par[i]:iの親の番号 (例) par[3] = 2 : 3の親が2vector<bool> isOk;vector<lli> siz; // 素集合のサイズを表す配列(1 で初期化)lli N;UnionFind(int N): par(N), isOk(N), siz(N) { //最初は全てが根であるとして初期化for (int i = 0; i < N; i++) {par[i] = i;isOk[i] = false;siz[i] = 1;}this->N = N;}int root(int x) { // データxが属する木の根を再帰で得る:root(x) = {xの木の根}if (par[x] == x)return x;return par[x] = root(par[x]);}void setOk(lli i) { isOk[i] = isOk[root(i)] = true; }bool isCheckOk(lli i) { return isOk[root(i)]; }void unite(int x, int y) { // xとyの木を併合int rx = root(x); // xの根をrxint ry = root(y); // yの根をryif (rx == ry)return; // xとyの根が同じ(=同じ木にある)時はそのままif (siz[rx] < siz[ry])swap(rx, ry);siz[rx] += siz[ry];par[ry] =rx; // xとyの根が同じでない(=同じ木にない)時:xの根rxをyの根ryにつけるif (isOk[rx] || isOk[ry]) {isOk[ry] = true;isOk[rx] = true;}}bool same(int x, int y) { // 2つのデータx, yが属する木が同じならtrueを返すint rx = root(x);int ry = root(y);return rx == ry;}lli size(lli x) { return siz[root(x)]; }};#define DEBUG 0lli A[800][800];lli di[2] = {1, 0};lli dj[2] = {0, 1};void solve() {// write your code herelli H, W;cin >> H >> W;REP(i, 0, H) {REP(j, 0, W) { cin >> A[i][j]; }}using P = pair<lli, pair<pair<lli, lli>, pair<lli, lli>>>;priority_queue<P, vector<P>, greater<P>> pq;REP(i, 0, H) {REP(j, 0, W) {REP(dir, 0, 2) {lli ni = i + di[dir];lli nj = j + dj[dir];if (ni >= H || nj >= W)continue;lli cost = max(A[i][j], A[ni][nj]);pq.push({cost, {{i, j}, {ni, nj}}});}}}UnionFind uf(H * W);//片方の点の相方を入れるmap<pair<lli, lli>, vector<pair<lli, lli>>> mp;map<lli, vector<pair<lli, lli>>> mp2;//クエリ番号を出すmap<pair<pair<lli, lli>, pair<lli, lli>>, vector<lli>> pairToQueryNum;lli Q;cin >> Q;vector<lli> ans(Q, 0);REP(i, 0, Q) {lli i1, j1, i2, j2;cin >> i1 >> j1 >> i2 >> j2;i1--;j1--;i2--;j2--;mp[{i1, j1}].push_back({i2, j2});mp[{i2, j2}].push_back({i1, j1});pairToQueryNum[{{i1, j1}, {i2, j2}}].push_back(i);pairToQueryNum[{{i2, j2}, {i1, j1}}].push_back(i);}REP(i, 0, H) {REP(j, 0, W) { mp2[uf.root(i * W + j)].push_back({i, j}); }}while (!pq.empty()) {auto now = pq.top();pq.pop();lli cost = now.first;lli i1 = now.second.first.first;lli j1 = now.second.first.second;lli i2 = now.second.second.first;lli j2 = now.second.second.second;if (uf.same(i1 * W + j1, i2 * W + j2))continue;LOG(cost, i1, j1, i2, j2);//小さいサイズの方のイベントを確認する// i1,j1の方が小さいif (uf.size({i1 * W + j1}) > uf.size({i2 * W + j2})) {swap(i1, i2);swap(j1, j2);}lli smallRoot = uf.root(i1 * W + j1);lli largeRoot = uf.root(i2 * W + j2);lli smallRootSize = mp2[smallRoot].size();lli largeRootSize = mp2[largeRoot].size();//追加予定の点の座標を持って置くvector<pair<lli, lli>> addV;for (auto p : mp2[smallRoot]) {lli ni = p.first;lli nj = p.second;addV.push_back({ni, nj});}uf.unite(i1 * W + j1, i2 * W + j2);//追加予定のものを追加していくときにクエリがあるか見ていくfor (auto p : addV) {lli ni = p.first;lli nj = p.second;for (auto np : mp[{ni, nj}]) {lli nni = np.first;lli nnj = np.second;if (uf.same(ni * W + nj, nni * W + nnj)) {for (auto nowQueryNum : pairToQueryNum[{p, np}]) {if (ans[nowQueryNum] == 0) {ans[nowQueryNum] = cost;}}}}// largeに突っ込んでおくmp2[largeRoot].push_back({ni, nj});}lli nowRootNum = uf.root(i1 * W + j1);lli nowRootNumSize = mp2[nowRootNum].size();LOG(smallRootSize, largeRootSize, nowRootNumSize);swap(mp2[nowRootNum], mp2[largeRoot]);}for (auto e : ans) {cout << e << endl;}}// Generated by 2.13.0 https://github.com/kyuridenamida/atcoder-tools (tips:// You use the default template now. You can remove this line by using your// custom template)int main() {// Failed to predict input formatlli N = 1;// cin >> N;while (N--)solve();return 0;}