Artifact e8ec418b9332bc9f23e92ad7e3cd5e9b09370fdc
#include <iostream>
#include <sstream>
#include <iomanip>
#include <vector>
#include <string>
#include <map>
#include <set>
#include <algorithm>
#include <numeric>
#include <iterator>
#include <functional>
#include <complex>
#include <queue>
#include <stack>
#include <cmath>
#include <cassert>
#include <cstring>
using namespace std;
typedef long long LL;
typedef complex<double> CMP;
class RowAndCoins { public:
string getWinner(string cells)
{
int n = cells.size();
int v = 0;
for(int i=0; i<n; ++i)
v = (v<<1) | (cells[i]=='B');
memo.clear();
return rec(0, v, n, 0) ? "Bob" : "Alice";
}
vector<int> memo;
int rec(int p, const int v, const int n, int mask)
{
int key = mask*2+p;
if( key >= memo.size() )
memo.resize(key+1, -1);
if( memo[key] >= 0 )
return memo[key];
for(int i=0; i<n; ++i)
if( mask == (1<<n)-1 - (1<<i) )
return memo[key] = (v&(1<<i) ? 1 : 0);
bool p_win = false;
for(int s=0; s<n; ++s)
for(int e=s+1; e<=n; ++e) if( e-s != n ) {
int mm = mask;
for(int i=s; i<e; ++i) {
if( mask&(1<<i) )
goto next;
mm |= (1<<i);
}
if( mm == (1<<n)-1 )
goto next;
if( p == rec(p^1, v, n, mm) )
p_win = true;
next:;
}
return memo[key] = (p_win ? p : p^1);
}
};
// BEGIN CUT HERE
#include <ctime>
double start_time; string timer()
{ ostringstream os; os << " (" << int((clock()-start_time)/CLOCKS_PER_SEC*1000) << " msec)"; return os.str(); }
template<typename T> ostream& operator<<(ostream& os, const vector<T>& v)
{ os << "{ ";
for(typename vector<T>::const_iterator it=v.begin(); it!=v.end(); ++it)
os << '\"' << *it << '\"' << (it+1==v.end() ? "" : ", "); os << " }"; return os; }
void verify_case(const string& Expected, const string& Received) {
bool ok = (Expected == Received);
if(ok) cerr << "PASSED" << timer() << endl; else { cerr << "FAILED" << timer() << endl;
cerr << "\to: \"" << Expected << '\"' << endl << "\tx: \"" << Received << '\"' << endl; } }
#define CASE(N) {cerr << "Test Case #" << N << "..." << flush; start_time=clock();
#define END verify_case(_, RowAndCoins().getWinner(cells));}
int main(){
CASE(0)
string cells = "ABBB";
string _ = "Alice";
END
CASE(1)
string cells = "BBBB";
string _ = "Bob";
END
CASE(2)
string cells = "BA";
string _ = "Alice";
END
CASE(3)
string cells = "BABBABBB";
string _ = "Bob";
END
CASE(4)
string cells = "ABABBBABAABBAA";
string _ = "Alice";
END
CASE(5)
string cells = "BBBAAABBAAABBB";
string _ = "Bob";
END
CASE(6)
string cells = "A";
string _ = "Alice";
END
CASE(7)
string cells = "B";
string _ = "Bob";
END
}
// END CUT HERE