結果
問題 | No.157 2つの空洞 |
ユーザー | torus711 |
提出日時 | 2015-05-12 13:47:29 |
言語 | C++11 (gcc 11.4.0) |
結果 |
AC
|
実行時間 | 2 ms / 2,000 ms |
コード長 | 3,624 bytes |
コンパイル時間 | 881 ms |
コンパイル使用メモリ | 103,592 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-07-06 00:05:31 |
合計ジャッジ時間 | 1,716 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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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 |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,376 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 2 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 1 ms
5,376 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 2 ms
5,376 KB |
testcase_08 | AC | 2 ms
5,376 KB |
testcase_09 | AC | 1 ms
5,376 KB |
testcase_10 | AC | 1 ms
5,376 KB |
testcase_11 | AC | 2 ms
5,376 KB |
testcase_12 | AC | 2 ms
5,376 KB |
testcase_13 | AC | 2 ms
5,376 KB |
testcase_14 | AC | 2 ms
5,376 KB |
testcase_15 | AC | 2 ms
5,376 KB |
testcase_16 | AC | 2 ms
5,376 KB |
testcase_17 | AC | 1 ms
5,376 KB |
testcase_18 | AC | 2 ms
5,376 KB |
testcase_19 | AC | 1 ms
5,376 KB |
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 ) ( c ).begin(), ( c ).end() #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 PB push_back #define EM emplace #define EB emplace_back #define BI back_inserter #define EXIST( c, e ) ( ( c ).find( e ) != ( c ).end() ) #define MP make_pair #define fst first #define snd second #define DUMP( x ) cerr << #x << " = " << ( x ) << endl constexpr int INF = LIM<>::max() / 2; constexpr int dy[] = { 0, 1, 0, -1 }; constexpr int dx[] = { 1, 0, -1, 0 }; int main() { cin.tie( 0 ); ios::sync_with_stdio( false ); int W, H; cin >> W >> H; VS board( H ); cin >> board; VVI distances( H, VI( W, INF ) ); queue< PII > que; REP( i, H ) { for ( int j = 0; j < W && que.empty(); ++j ) { if ( board[i][j] == '.' ) { distances[i][j] = 0; que.EM( i, j ); } } } while ( !que.empty() ) { const int y = que.front().fst; const int x = que.front().snd; que.pop(); REP( d, 4 ) { const int ny = y + dy[d]; const int nx = x + dx[d]; if ( 0 <= ny && ny < H && 0 <= nx && nx < W && board[ ny ][ nx ] == '.' && distances[ ny ][ nx ] != 0 ) { distances[ ny ][ nx ] = 0; que.EM( ny, nx ); } } } REP( i, H ) { REP( j, W ) { if ( distances[i][j] == 0 ) { que.EM( i, j ); } } } while ( !que.empty() ) { const int y = que.front().fst; const int x = que.front().snd; que.pop(); REP( d, 4 ) { const int ny = y + dy[d]; const int nx = x + dx[d]; if ( 0 <= ny && ny < H && 0 <= nx && nx < W && distances[y][x] + 1 < distances[ ny ][ nx ] ) { distances[ ny ][ nx ] = distances[y][x] + 1; que.EM( ny, nx ); } } } int res = INF; REP( i, H ) { REP( j, W ) { if ( board[i][j] == '.' && distances[i][j] ) { res = min( res, distances[i][j] - 1 ); } } } cout << res << endl; return 0; }