結果
問題 | No.2696 Sign Creation |
ユーザー |
|
提出日時 | 2024-03-22 22:07:34 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 94 ms / 2,500 ms |
コード長 | 3,202 bytes |
コンパイル時間 | 2,828 ms |
コンパイル使用メモリ | 217,472 KB |
最終ジャッジ日時 | 2025-02-20 11:42:42 |
ジャッジサーバーID (参考情報) |
judge5 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 38 |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll = long long; struct dsu { public: int csz; dsu() : _n(0) {} dsu(int n) : _n(n), csz(n), parent_or_size(n, -1) {} int merge(int a, int b) { assert(0 <= a && a < _n); assert(0 <= b && b < _n); int x = leader(a), y = leader(b); if (x == y) return x; if (-parent_or_size[x] < -parent_or_size[y]) std::swap(x, y); csz--; parent_or_size[x] += parent_or_size[y]; parent_or_size[y] = x; return x; } bool same(int a, int b) { assert(0 <= a && a < _n); assert(0 <= b && b < _n); return leader(a) == leader(b); } int leader(int a) { assert(0 <= a && a < _n); if (parent_or_size[a] < 0) return a; return parent_or_size[a] = leader(parent_or_size[a]); } int size(int a) { assert(0 <= a && a < _n); return -parent_or_size[leader(a)]; } std::vector<std::vector<int>> groups() { std::vector<int> leader_buf(_n), group_size(_n); for (int i = 0; i < _n; i++) { leader_buf[i] = leader(i); group_size[leader_buf[i]]++; } std::vector<std::vector<int>> result(_n); for (int i = 0; i < _n; i++) { result[i].reserve(group_size[i]); } for (int i = 0; i < _n; i++) { result[leader_buf[i]].push_back(i); } result.erase( std::remove_if(result.begin(), result.end(), [&](const std::vector<int>& v) { return v.empty(); }), result.end()); return result; } private: int _n; // root node: -1 * component size // otherwise: parent std::vector<int> parent_or_size; }; int main(){ ios::sync_with_stdio(false); cin.tie(0); vector<vector<pair<int,int>>> dir(6); for(int y = -5; y <= 5; y++){ for(int x = -5; x <= 5; x++){ int d = abs(x) + abs(y); if(d <= 5) dir[d].emplace_back(y, x); } } int h, w, n, d; cin >> h >> w >> n >> d; vector<pair<int,int>> a(n); for(auto &&[y, x] : a) cin >> y >> x, y--, x--; sort(a.begin(), a.end()); vector<vector<int>> A(h, vector<int>(w, -1)); for(int i = 0; i < n; i++){ A[a[i].first][a[i].second] = i; } dsu uf(n); for(int y = 0; y < h; y++){ for(int x = 0; x < w; x++){ if(A[y][x] == -1) continue; for(int di = 1; di <= d; di++){ for(auto [ny, nx] : dir[di]){ ny += y, nx += x; if(ny < 0 || nx < 0 || ny >= h || nx >= w) continue; if(A[ny][nx] == -1) continue; uf.merge(A[y][x], A[ny][nx]); } } } } int v = 0; vector<int> cnt(n); for(auto &&G : uf.groups()){ int u = uf.leader(G[0]); cnt[u] = G.size(); v += G.size() >= 2; } int mn = v, mx = v; for(int y = 0; y < h; y++){ for(int x = 0; x < w; x++){ if(A[y][x] != -1) continue; vector<int> S; for(int di = 1; di <= d; di++){ for(auto [ny, nx] : dir[di]){ ny += y, nx += x; if(ny < 0 || nx < 0 || ny >= h || nx >= w) continue; if(A[ny][nx] == -1) continue; S.push_back(uf.leader(A[ny][nx])); } } sort(S.begin(), S.end()); S.erase(unique(S.begin(), S.end()), S.end()); int add = 0, num = 1; for(auto &&v : S){ if(num == 1){ num += cnt[v]; if(cnt[v] == 1) add++; }else{ num += cnt[v]; if(cnt[v] == 1) continue; add--; } } mx = max(mx, v + add); mn = min(mn, v + add); } } cout << mn << " " << mx << '\n'; }