結果
問題 | No.348 カゴメカゴメ |
ユーザー | torus711 |
提出日時 | 2016-02-26 23:45:54 |
言語 | C++11 (gcc 11.4.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 5,319 bytes |
コンパイル時間 | 1,320 ms |
コンパイル使用メモリ | 118,084 KB |
実行使用メモリ | 27,448 KB |
最終ジャッジ日時 | 2024-09-23 03:08:57 |
合計ジャッジ時間 | 7,928 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
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testcase_00 | TLE | - |
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ソースコード
#include <iostream> #include <iomanip> #include <sstream> #include <vector> #include <string> #include <set> #include <unordered_set> #include <map> #include <unordered_map> #include <stack> #include <queue> #include <deque> #include <algorithm> #include <functional> #include <iterator> #include <limits> #include <numeric> #include <utility> #include <cmath> #include <cassert> #include <cstdio> using namespace std; using namespace placeholders; using LL = long long; using ULL = unsigned long long; using VI = vector< int >; using VVI = vector< vector< int > >; using VS = vector< string >; using SS = stringstream; using PII = pair< int, int >; using VPII = vector< pair< int, int > >; template < typename T = int > using VT = vector< T >; template < typename T = int > using VVT = vector< vector< T > >; template < typename T = int > using LIM = numeric_limits< T >; template < typename T > inline istream& operator>>( istream &s, vector< T > &v ){ for ( T &t : v ) { s >> t; } return s; } template < typename T > inline ostream& operator<<( ostream &s, const vector< T > &v ){ for ( int i = 0; i < int( v.size() ); ++i ){ s << ( " " + !i ) << v[i]; } return s; } template < typename T > inline T fromString( const string &s ) { T res; istringstream iss( s ); iss >> res; return res; } template < typename T > inline string toString( const T &a ) { ostringstream oss; oss << a; return oss.str(); } #define REP2( i, n ) REP3( i, 0, n ) #define REP3( i, m, n ) for ( int i = ( int )( m ); i < ( int )( n ); ++i ) #define GET_REP( a, b, c, F, ... ) F #define REP( ... ) GET_REP( __VA_ARGS__, REP3, REP2 )( __VA_ARGS__ ) #define FOR( e, c ) for ( auto &&e : c ) #define ALL( c ) begin( c ), end( c ) #define AALL( a, t ) ( t* )a, ( t* )a + sizeof( a ) / sizeof( t ) #define DRANGE( c, p ) ( c ).begin(), ( c ).begin() + ( p ), ( c ).end() #define SZ( v ) ( (int)( v ).size() ) #define EXIST( c, e ) ( ( c ).find( e ) != ( c ).end() ) template < typename T > inline bool chmin( T &a, const T &b ){ if ( b < a ) { a = b; return true; } return false; } template < typename T > inline bool chmax( T &a, const T &b ){ if ( a < b ) { a = b; return true; } return false; } #define PB push_back #define EM emplace #define EB emplace_back #define BI back_inserter #define MP make_pair #define fst first #define snd second #define DUMP( x ) cerr << #x << " = " << ( x ) << endl constexpr int INF = LIM<>::max() / 2; int N, M; VS board; VVI G; VI sizes; VVI visited; constexpr bool inside( const int y, const int x ) { return 0 <= y && y < N && 0 <= x && x < M; } inline bool throuable( const int y1, const int x1, const int y2, const int x2 ) { if ( board[ y2 ][ x2 ] == 'x' ) { return false; } const auto mmy = minmax( y1, y2 ); const auto mmx = minmax( x1, x2 ); int cnt = 0; REP( y, mmy.fst, mmy.snd + 1 ) { REP( x, mmx.fst, mmx.snd + 1 ) { cnt += board[y][x] == 'x'; } } return cnt <= 1; } void dfs( const int sy, const int sx, const int u ) { if ( SZ( G ) <= u ) { G.resize( u + 1 ); sizes.resize( u + 1 ); } if ( board[ sy ][ sx ] == 'x' ) { // erase current loop queue< PII > que; que.EM( sy, sx ); int cnt = 0; while ( !que.empty() ) { const int y = que.front().fst; const int x = que.front().snd; que.pop(); REP( dy, -1, 2 ) { REP( dx, -1, 2 ) { if ( !( dy | dx ) ) { continue; } const int ny = y + dy; const int nx = x + dx; if ( !inside( ny, nx ) || board[ ny ][ nx ] == '.' ) { continue; } ++cnt; board[ ny ][ nx ] = '.'; visited[ ny ][ nx ] = 2; que.EM( ny, nx ); } } } sizes[u] = cnt; } VPII nexts; { // find adjacenta loops queue< PII > que; que.EM( sy, sx ); while ( !que.empty() ) { const int y = que.front().fst; const int x = que.front().snd; que.pop(); REP( dy, -1, 2 ) { REP( dx, -1, 2 ) { if ( !( dy | dx ) ) { continue; } const int ny = y + dy; const int nx = x + dx; if ( !inside( ny, nx ) || visited[ ny ][ nx ] ) { continue; } if ( board[ ny ][ nx ] == 'x' ) { nexts.EB( ny, nx ); } if ( throuable( y, x, ny, nx ) ) { que.EM( ny, nx ); visited[ ny ][ nx ] = true; } } } } } FOR( p, nexts ) { const int y = p.fst; const int x = p.snd; if ( visited[y][x] == 2 ) { continue; } visited[y][x] = true; G[u].PB( SZ( G ) ); dfs( y, x, SZ( G ) ); } return; } VVI dp; int rec( const int u, const int f ) { int &res = dp[u][f]; if ( f ) // use current node { int total = sizes[u]; FOR( v, G[u] ) { total += rec( v, 0 ); } chmax( res, total ); } { // do not use current node int total = 0; FOR( v, G[u] ) { total += max( rec( v, 0 ), rec( v, 1 ) ); } chmax( res, total ); } return res; } int main() { cin.tie( 0 ); ios::sync_with_stdio( false ); cin >> N >> M; board.resize( N ); cin >> board; board.insert( begin( board ), string( M + 2, '.' ) ); REP( i, 1, N + 1 ) { board[i] = "." + board[i] + "."; } board.EB( M + 2, '.' ); N += 2; M += 2; visited.resize( N, VI( M ) ); dfs( 0, 0, 0 ); const int V = SZ( sizes ); dp.resize( V, VI( 2, -INF ) ); cout << rec( 0, 0 ) << endl; return 0; }