結果
問題 | No.2731 Two Colors |
ユーザー |
|
提出日時 | 2024-04-20 15:34:24 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 240 ms / 3,000 ms |
コード長 | 3,991 bytes |
コンパイル時間 | 4,803 ms |
コンパイル使用メモリ | 260,904 KB |
最終ジャッジ日時 | 2025-02-21 06:44:40 |
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>#include <atcoder/all>#pragma GCC target("avx2")#pragma GCC optimize("O3")#pragma GCC optimize("unroll-loops")#define SELECTER(_1,_2,_3,SELECT,...) SELECT#define rep1(i,n) for(int i=0;i<(int)n;++i)#define rep2(i,a,n) for(int i=(int)a;i<(int)n;++i)#define rep(...) SELECTER(__VA_ARGS__,rep2,rep1)(__VA_ARGS__)#define RSELECTER(_1, _2, _3, RSELECT, ...) RSELECT#define rrep1(i,n) for(int i=(int)(n)-1;i>=0;--i)#define rrep2(i,a,n) for(int i=(int)(n)-1;i>=(int)a;--i)#define rrep(...) RSELECTER(__VA_ARGS__, rrep2, rrep1)(__VA_ARGS__)#define all(a) a.begin(),a.end()#define rall(a) a.rbegin(),a.rend()#define fi first#define se second#define PrintR LogOutput#ifdef _DEBUG#define Log(...) LogOutput(__VA_ARGS__)#else#define Log(...)#endif#define M_PI 3.14159265358979323846using namespace std;using namespace atcoder;using ll=long long;using ld=long double;using pii=pair<int,int>;using pll=pair<long long,long long>;using pdd=pair<long double,long double>;using tp=tuple<int,int,int>;using tpll=tuple<ll,ll,ll>;using veci=vector<int>;using vecpii=vector<pair<int,int>>;using vecll=vector<long long>;using vecpll=vector<pair<long long,long long>>;using vecpdd=vector<pair<long double,long double>>;using vecs=vector<string>;using vecb=vector<bool>;using vecd=vector<long double>;using vectp=vector<tp>;using vectpll=vector<tpll>;using mint=modint998244353;using mint10=modint1000000007;template<typename T, typename S>istream& operator>>(istream& in, pair<T, S>& a){return in >> a.first >> a.second;}template<typename T, typename S>ostream& operator<<(ostream& out, const pair<T, S>& a){return out << a.first << ' ' << a.second;}ostream& operator<<(ostream& out, const mint& a){return out << a.val();}ostream& operator<<(ostream& out, const mint10& a){return out << a.val();}ostream& operator<<(ostream& out, const modint& a){return out << a.val();}template<typename T>ostream& operator<<(ostream& out, const vector<T>& d){for(int i = 0 ; i < d.size() ; ++i) out << d[i] << (i == d.size() - 1 ? "" : " "); return out;}template<typename T, typename S>pair<T, S> operator+(const pair<T, S>& a, const pair<T, S>& b){return {a.fi + b.fi, a.se + b.se};}template<typename T, typename S>pair<T, S> operator-(const pair<T, S>& a, const pair<T, S>& b){return {a.fi - b.fi, a.se - b.se};}template<class T> inline bool chmax(T& a,T b){if(a<b) {a=b;return true;} return false;}template<class T> inline bool chmin(T& a,T b){if(a>b) {a=b;return true;} return false;}bool Judge(int i, int j, int h, int w){return i < 0 || j < 0 || i >= h || j >= w;}bool PrintA(int i){cout<<(i ? "Yes" : "No")<<endl;return i;}constexpr ll INF=numeric_limits<ll>::max() >> 2;constexpr int inf=numeric_limits<int>::max() >> 1;constexpr ll MOD=998244353;const int vi[] = {0, 1, 0, -1}, vj[] = {1, 0, -1, 0};template<typename... Args>void LogOutput(Args&&... args){stringstream ss;((ss << args << ' '), ...);cout << ss.str().substr(0, ss.str().length() - 1) << endl;}template<typename T>void LogOutput(vector<vector<T>>& data){for(auto d : data) LogOutput(d);}int main(){ios::sync_with_stdio(false);std::cin.tie(nullptr);int h, w;cin>>h>>w;vector a(h, veci(w));rep(i, h) rep(j, w) cin>>a[i][j];vector q(2, priority_queue<pii, vecpii, greater<pii>>());q[0].emplace(a[0][0], 0);q[1].emplace(a[h - 1][w - 1], (h - 1) * w + w - 1);vector c(h, veci(w, -1));int ans = -2;for(int i = 0; ; i ^= 1){auto [d, k] = q[i].top(); q[i].pop();int l = k / w, r = k % w;if(c[l][r] != -1){i ^= 1;continue;}ans++;c[l][r] = i;int u = 1;rep(p, 4){int ni = l + vi[p];int nj = r + vj[p];if(Judge(ni, nj, h, w)) continue;if(c[ni][nj] == (i ^ 1)){u = 0;break;}}if(!u) break;rep(p, 4){int ni = l + vi[p];int nj = r + vj[p];if(Judge(ni, nj, h, w)) continue;if(c[ni][nj] == -1)q[i].emplace(a[ni][nj], ni * w + nj);}}cout<<ans<<endl;}