public string Solve(Problem problem, int seed, string[] powerPhrases)
{
var finalPowerPhraseBuilder = new SimplePowerPhraseBuilder(powerPhrases);
var spelledPhrases = new bool[powerPhrases.Length];
var solution = new List<MoveType>();
var game = new SolverGame(problem, seed, powerPhrases);
while (true)
{
switch (game.state)
{
case GameBase.State.WaitUnit:
game.Step();
break;
case GameBase.State.UnitInGame:
var reachablePositions = new ReachablePositionsWithWords(game.map, powerPhrases, spelledPhrases);
var evaluatePositions = new EvaluatePositions2(game.map);
var endPositions = reachablePositions.EndPositions(game.currentUnit);
var estimated = new Dictionary<Unit, double>();
var bestPosition = endPositions.ArgMax(p =>
{
double value;
if (estimated.TryGetValue(p.Item1, out value))
return value;
return estimated[p.Item1] = evaluatePositions.Evaluate(p.Item1);
});
var score = evaluatePositions.Evaluate(bestPosition.Item1);
var wayToBestPosition = bestPosition.Item2;
var unitSolution = staticPowerPhraseBuilder.Build(wayToBestPosition.path);
SolutionAdded(game, unitSolution);
game.ApplyUnitSolution(unitSolution);
spelledPhrases = wayToBestPosition.spelledWords;
solution.AddRange(wayToBestPosition.path);
break;
case GameBase.State.EndInvalidCommand:
case GameBase.State.EndPositionRepeated:
throw new InvalidOperationException(string.Format("Invalid state: {0}", game.state));
case GameBase.State.End:
return finalPowerPhraseBuilder.Build(solution);
default:
throw new ArgumentOutOfRangeException();
}
}
}
private IEnumerable<State> FindNextStates(State state)
{
var map = state.lastmap.Clone();
map.LockUnit(state.lastUnit);
map.RemoveLines();
var nextUnit = units[state.nunits];
var reachablePositions = new ReachablePositionsWithWords(map, powerPhrases, state.spelledPhrases);
var evaluatePositions = new EvaluatePositions2(map);
var endPositions = reachablePositions.EndPositions(nextUnit);
var estimated = new Dictionary<Unit, Tuple<double, int>>();
Tuple<Unit, ReachablePositionsWithWords.VisitedInfo>[] bestPositions = endPositions.OrderByDescending(
p => {
Tuple<double, int> value;
var unit = p.Item1;
if (!estimated.TryGetValue(unit, out value))
value = estimated[p.Item1] = evaluatePositions._Evaluate(p.Item1);
return value.Item1;
}).Take(100).ToArray();
foreach (var position in bestPositions)
{
var unit = position.Item1;
var ndropped = estimated[unit].Item2;
var move_score = CountPoints(unit.members.Count, state.lastDroopedLines, estimated[unit].Item2);
var score = state.score + move_score;
yield return new State()
{
lastmap = map,
lastUnit = unit,
nunits = state.nunits + 1,
lastDroopedLines = ndropped,
score = score,
solution = state.solution.Concat(position.Item2.path).ToArray(),
spelledPhrases = position.Item2.spelledWords,
sumPositionEstimates = state.sumPositionEstimates + 10 + estimated[unit].Item1
};
}
}
