結果
問題 |
No.2731 Two Colors
|
ユーザー |
👑 ![]() |
提出日時 | 2025-02-08 03:33:04 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 395 ms / 3,000 ms |
コード長 | 3,294 bytes |
コンパイル時間 | 2,306 ms |
コンパイル使用メモリ | 207,268 KB |
実行使用メモリ | 16,732 KB |
最終ジャッジ日時 | 2025-02-08 03:33:15 |
合計ジャッジ時間 | 9,831 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 33 |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll=long long; using ld=long double; const ll ILL=2167167167167167167; const int INF=2100000000; #define rep(i,a,b) for (int i=(int)(a);i<(int)(b);i++) #define all(p) p.begin(),p.end() template<class T> using _pq = priority_queue<T, vector<T>, greater<T>>; template<class T> int LB(vector<T> &v,T a){return lower_bound(v.begin(),v.end(),a)-v.begin();} template<class T> int UB(vector<T> &v,T a){return upper_bound(v.begin(),v.end(),a)-v.begin();} template<class T> bool chmin(T &a,T b){if(b<a){a=b;return 1;}else return 0;} template<class T> bool chmax(T &a,T b){if(a<b){a=b;return 1;}else return 0;} template<class T> void So(vector<T> &v) {sort(v.begin(),v.end());} template<class T> void Sore(vector<T> &v) {sort(v.begin(),v.end(),[](T x,T y){return x>y;});} bool yneos(bool a,bool upp=false){if(a){cout<<(upp?"YES\n":"Yes\n");}else{cout<<(upp?"NO\n":"No\n");}return a;} template<class T> void vec_out(vector<T> &p,int ty=0){ if(ty==2){cout<<'{';for(int i=0;i<(int)p.size();i++){if(i){cout<<",";}cout<<'"'<<p[i]<<'"';}cout<<"}\n";} else{if(ty==1){cout<<p.size()<<"\n";}for(int i=0;i<(int)(p.size());i++){if(i) cout<<" ";cout<<p[i];}cout<<"\n";}} template<class T> T vec_min(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmin(ans,x);return ans;} template<class T> T vec_max(vector<T> &a){assert(!a.empty());T ans=a[0];for(auto &x:a) chmax(ans,x);return ans;} template<class T> T vec_sum(vector<T> &a){T ans=T(0);for(auto &x:a) ans+=x;return ans;} int pop_count(long long a){int res=0;while(a){res+=(a&1),a>>=1;}return res;} template<class T> T square(T a){return a * a;} #include <atcoder/modint> using mint = atcoder::modint998244353; void solve(); // CITRUS CURIO CITY / FREDERIC int main() { ios::sync_with_stdio(false); cin.tie(nullptr); int t = 1; // cin >> t; rep(i, 0, t) solve(); } void solve(){ int H, W; cin >> H >> W; vector A(H, vector<int>(W)); rep(i, 0, H) rep(j, 0, W){ cin >> A[i][j]; } auto f = [&](int sx, int sy) -> vector<vector<int>> { vector<int> dx = {1, -1, 0, 0}; vector<int> dy = {0, 0, 1, -1}; _pq<pair<int, pair<int, int>>> pq; pq.push({A[sx][sy], {sx, sy}}); int C = 0; vector seen(H, vector<int> (W, -1)); seen[sx][sy] = -2; while (!pq.empty()){ auto tmp = pq.top(); pq.pop(); auto [x, y] = tmp.second; seen[x][y] = C++; rep(k, 0, 4){ int a = x + dx[k]; int b = y + dy[k]; if (a < 0 || b < 0 || H <= a || W <= b) continue; if (seen[a][b] != -1) continue; seen[a][b] = -2; pq.push({A[a][b], {a, b}}); } } return seen; }; auto X = f(0, 0); auto Y = f(H - 1, W - 1); int ans = INF; rep(i, 0, H) rep(j, 0, W){ if (i + 1 != H){ chmin(ans, max(X[i][j] * 2, Y[i + 1][j] * 2 + 1)); chmin(ans, max(X[i + 1][j] * 2, Y[i][j] * 2 + 1)); } if (j + 1 != W){ chmin(ans, max(X[i][j] * 2, Y[i][j + 1] * 2 + 1)); chmin(ans, max(X[i][j + 1] * 2, Y[i][j] * 2 + 1)); } } cout << ans - 1 << "\n"; }