結果

問題 No.2786 RMQ on Grid Path
ユーザー soto800
提出日時 2024-06-15 15:01:31
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
WA  
実行時間 -
コード長 7,579 bytes
コンパイル時間 3,324 ms
コンパイル使用メモリ 240,340 KB
最終ジャッジ日時 2025-02-21 22:47:11
ジャッジサーバーID
(参考情報)
judge1 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 12 WA * 23
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ソースコード

diff #
プレゼンテーションモードにする

#include <bits/stdc++.h>
#include <cassert>
//#include <atcoder/all>
using namespace std;
#define lli long long 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_e
struct UnionFind {
vector<int> par; // par[i]:i () par[3] = 2 : 32
vector<bool> isOk;
vector<lli> siz; // (1 )
lli N;
UnionFind(int N)
: par(N), isOk(N), siz(N) { //
for (int i = 0; i < N; i++) {
par[i] = i;
isOk[i] = false;
siz[i] = 1;
}
this->N = N;
}
int root(int x) { // xroot(x) = {x}
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) { // xy
int rx = root(x); // xrx
int ry = root(y); // yry
if (rx == ry)
return; // xy(=)
if (siz[rx] < siz[ry])
swap(rx, ry);
siz[rx] += siz[ry];
par[ry] =
rx; // xy(=)xrxyry
if (isOk[rx] || isOk[ry]) {
isOk[ry] = true;
isOk[rx] = true;
}
}
bool same(int x, int y) { // 2x, ytrue
int rx = root(x);
int ry = root(y);
return rx == ry;
}
lli size(lli x) { return siz[root(x)]; }
};
#define DEBUG 0
lli A[800][800];
lli di[2] = {1, 0};
lli dj[2] = {0, 1};
void solve() {
// write your code here
lli 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);
//
map<pair<lli, lli>, vector<pair<lli, lli>>> mp;
map<lli, set<pair<lli, lli>>> mp2;
//
map<pair<pair<lli, lli>, pair<lli, lli>>, 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}}] = i;
pairToQueryNum[{{i2, j2}, {i1, j1}}] = i;
}
REP(i, 0, H) {
REP(j, 0, W) { mp2[uf.root(i * W + j)].insert({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);
//
// i1,j1
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();
//
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);
//
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)) {
lli nowQueryNum = pairToQueryNum[{{ni, nj}, {nni, nnj}}];
if (ans[nowQueryNum] == 0) {
ans[pairToQueryNum[{{ni, nj}, {nni, nnj}}]] = cost;
}
}
}
// large
mp2[largeRoot].insert({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 format
lli N = 1;
// cin >> N;
while (N--)
solve();
return 0;
}
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