【题解】The Magician HDU 6565 大模拟

寒假大模拟加训。
直接贴代码。
一遍过样例，一遍AC，开心～

#include <bits/stdc++.h>

using namespace std;
typedef pair<int,int> pii;
int _w;

enum { plain = 0, swamp = 1, mountain = 2, island = 3, forest = 4 };

queue<int> deck[2];

int hand[2][5], field[2][5], grave[2][5];

void draw_card( int p ) {
	queue<int> &dck = deck[p];
	int *hnd = hand[p];

	if( !dck.empty() ) {
		int x = dck.front();
		dck.pop();
		++hnd[x];
	}
}

bool draw() {
	if( !deck[0].empty() ) return false;
	if( !deck[1].empty() ) return false;
	for( int i = 0; i < 2; ++i )
		for( int j = 0; j < 5; ++j )
			if( hand[i][j] ) return false;
	return true;
}

bool win( int p ) {
	int *fld = field[p];
	for( int i = 0; i < 5; ++i )
		if( !fld[i] )
			return false;
	return true;
}

bool empty( int p, int cd[2][5] ) {
	for( int i = 0; i < 5; ++i )
		if( cd[p][i] )
			return false;
	return true;
}

bool have_effect( int p, int c ) {
	queue<int> &dck = deck[p];
	
	if( c == plain ) {
		return !dck.empty();
	} else if( c == swamp ) {
		return !empty(p^1, hand);
	} else if( c == mountain ) {
		return !empty(p^1, field);
	} else if( c == island ) {
		return false;
	} else if( c == forest ) {
		return !empty(p, grave);
	} else {
		return assert(0), false;
	}
}

int select_card( int p ) {
	static const int prior[] = { swamp, plain, mountain, forest, island };
	int *hnd = hand[p];
	int *fld = field[p];
	
	vector<int> high, mid;
	for( int i = 0; i < 5; ++i )
		if( hnd[i] ) {
			if( !fld[i] ) {
				if( have_effect(p, i) ) {
					high.push_back(i);
				} else {
					mid.push_back(i);
				}
			}
		}
	if( !high.empty() ) {
		for( int i = 0; i < 5; ++i ) {
			int id = prior[i];
			for( int x : high )
				if( id == x ) {
					--hnd[x];
					return x;
				}
		}
		return assert(0), -1;
	} else if( !mid.empty() ) {
		for( int i = 0; i < 5; ++i ) {
			int id = prior[i];
			for( int x : mid )
				if( x == id ) {
					--hnd[x];
					return x;
				}
		}
		return assert(0), -1;
	} else {
		return -1;
	}
}

int count( int p, int cd[2][5] ) {
	int cnt = 0;
	for( int i = 0; i < 5; ++i )
		cnt += cd[p][i];
	return cnt;
}

void discard( int p ) {
	static const int prior[] = { island, mountain, plain, swamp, forest };
	int *hnd = hand[p];
	int *grv = grave[p];
	
	vector<int> cnt[6];
	for( int i = 0; i < 5; ++i )
		cnt[hnd[i]].push_back(i);
	for( int i = 5; i > 0; --i ) {
		for( int j = 0; j < 5; ++j ) {
			int id = prior[j];
			for( int x : cnt[i] )
				if( x == id ) {
					--hnd[x];
					++grv[x];
					return;
				}
		}
	}
	assert(0);
}

void do_mountain( int p ) {
	static const int prior[] = { forest, island, mountain, plain, swamp };

	vector<int> cnt[6];
	for( int i = 0; i < 5; ++i )
		cnt[field[p^1][i]].push_back(i);
	for( int i = 1; i <= 5; ++i ) {
		for( int j = 0; j < 5; ++j ) {
			int id = prior[j];
			for( int x : cnt[i] )
				if( x == id ) {
					--field[p^1][x];
					++grave[p^1][x];
					return;
				}
		}
	}
	assert(0);
}

void do_forest( int p ) {
	static const int prior[] = { forest, swamp, mountain, island, plain };
	int *hnd = hand[p];
	int *fld = field[p];
	int *grv = grave[p];
	
	vector<int> cnt[6];
	for( int i = 0; i < 5; ++i )
		cnt[hnd[i] + fld[i]].push_back(i);
	for( int i = 0; i < 5; ++i ) {
		for( int j = 0; j < 5; ++j ) {
			int id = prior[j];
			for( int x : cnt[i] )
				if( x == id ) {
					if( grv[x] ) {
						--grv[x];
						++hnd[x];
						return;
					}
				}
		}
	}
	assert(0);
}

bool counter_attack( int p ) {
	int last = -1;
	for( int i = 0; i < 5; ++i )
		if( !field[p^1][i] ) {
			if( last == -1 ) last = i;
			else return false;
		}
	assert( last != -1 );
	if( grave[p^1][last] == 5 ) {
		return false;
	} else {
		if( hand[p][island] && count(p, hand) >= 2 ) {
			--hand[p][island];
			++grave[p][island];
			discard(p);
			return true;
		} else {
			return false;
		}
	}
}

void play_card( int p, int cd ) {
	if( counter_attack(p^1) ) {
		++grave[p][cd];
	} else {
		++field[p][cd];
		if( cd == plain ) {
			draw_card(p);
		} else if( cd == swamp ) {
			if( !empty(p^1, hand) )
				discard(p^1);
		} else if( cd == mountain ) {
			if( !empty(p^1, field) )
				do_mountain(p);
		} else if( cd == island ) {
			;
		} else if( cd == forest ) {
			if( !empty(p, grave) )
				do_forest(p);
		} else {
			assert(0);
		}
	}
}

void main_phase( int p ) {
	int card = select_card(p);
	if( card != -1 )
		play_card(p, card);
}

void play( int p ) {
	queue<int> &dck = deck[p];
	int *hnd = hand[p];
	
	if( !dck.empty() ) {
		int x = dck.front();
		dck.pop();
		++hnd[x];
	}
	
	main_phase(p);
}

pii solve() {
	for( int i = 0; i < 5; ++i )
		draw_card(0);
	for( int i = 0; i < 5; ++i )
		draw_card(1);
	for( int i = 1; i <= 100; ++i ) {
		int p = !(i & 1);
		play(p);
		if( win(p) ) return pii(p, i);
		if( draw() ) return pii(-1, i);
	}
	return pii(-1, 100);
}

void clean() {
	while( !deck[0].empty() ) deck[0].pop();
	while( !deck[1].empty() ) deck[1].pop();
	memset(hand, 0, sizeof hand);
	memset(field, 0, sizeof field);
	memset(grave, 0, sizeof grave);
}

int main() {
	int T;
	_w = scanf( "%d", &T );
	for( int kase = 1; kase <= T; ++kase ) {
		for( int i = 0; i < 25; ++i ) {
			int x;
			_w = scanf( "%d", &x );
			deck[0].push(x);
		}
		for( int i = 0; i < 25; ++i ) {
			int x;
			_w = scanf( "%d", &x );
			deck[1].push(x);
		}
		pii ans = solve();
		printf( "Case %d: ", kase );
		if( ans.first == 0 ) printf( "Alice %d
", ans.second );
		else if( ans.first == 1 ) printf( "Bob %d
", ans.second );
		else printf( "Draw %d
", ans.second );
		clean();
	}
	return 0;
}