結果
問題 | No.173 カードゲーム(Medium) |
ユーザー | torus711 |
提出日時 | 2015-03-26 23:57:47 |
言語 | C++11 (gcc 13.3.0) |
結果 |
AC
|
実行時間 | 1,981 ms / 3,000 ms |
コード長 | 3,289 bytes |
コンパイル時間 | 1,023 ms |
コンパイル使用メモリ | 107,472 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-06-29 01:11:24 |
合計ジャッジ時間 | 13,593 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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ファイルパターン | 結果 |
---|---|
other | AC * 10 |
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#include <random>mt19937 rng;uniform_int_distribution< int > rng_idx( 1, 19 );uniform_real_distribution< double > rng_p( 0, 1 );constexpr int SIM = 1000000;int N;double Pa, Pb;inline int select( const double p, VI &as ){if ( SZ( as ) == 1 ){return as[0];}else if ( rng_p( rng ) <= p ){const int res = as[0];as.erase( as.begin() );return res;}else{rng_idx.param( uniform_int_distribution< int >::param_type( 1, SZ( as ) - 1 ) );const int idx = rng_idx( rng );const int res = as[ idx ];as.erase( as.begin() + idx );return res;}}inline bool sim( VI as, VI bs ){int pt1 = 0, pt2 = 0;REP( i, N ){const int a = select( Pa, as );const int b = select( Pb, bs );if ( a < b ){pt2 += a + b;}if ( a > b ){pt1 += a + b;}}return pt1 > pt2;}int main(){cin.tie( 0 );ios::sync_with_stdio( false );cin >> N >> Pa >> Pb;VI as( N ), bs( N );cin >> as >> bs;sort( ALL( as ) );sort( ALL( bs ) );int win = 0;REP( i, SIM ){win += sim( as, bs );}cout << setprecision( 5 ) << fixed << 1. * win / SIM << endl;return 0;}