private SkyscraperNxNDataLists ReduceLists(SkyscraperNxNDataLists dataLists, out SkyscraperData_Perms data)
{
data = null;
PerformListReduction(dataLists);
int shortest;
if (!CheckListsAndFindShortest(dataLists, out shortest))
{
return(null);
}
if (shortest == -1)
{
TryPopulateResultsData(dataLists, out data);
return(dataLists);
}
for (int i = 0; i < dataLists.Lists[shortest].Idx.Count; i++)
{
SkyscraperNxNDataLists next = new SkyscraperNxNDataLists(dataLists);
next.Lists[shortest].Idx = new List <int>()
{
dataLists.Lists[shortest].Idx[i]
};
ReduceListsSingleItemOnList(next, shortest);
SkyscraperNxNDataLists nextres = ReduceLists(next, out data);
if ((nextres != null) && TryPopulateResultsData(nextres, out data))
{
return(nextres);
}
}
return(null);
}
private bool TryPopulateResultsData(SkyscraperNxNDataLists dataLists, out SkyscraperData_Perms data)
{
data = null;
SkyscraperData_Perms tdata = new SkyscraperData_Perms(_n);
if (PopulateResultsData(dataLists, tdata))
{
data = tdata;
return(true);
}
return(false);
}
private bool PopulateResultsData(SkyscraperNxNDataLists dataLists, SkyscraperData_Perms data)
{
//ustawienie elementow ze zredukowanych list
for (int i = 0; i < dataLists.Lists.Length; i++)
{
if (dataLists.Lists[i] != null)
{
for (int j = 0; j < _n; j++)
{
data.SetSingleElement(GetDataRowCol(i, j), dataLists.Lists[i].PrecalcData[dataLists.Lists[i].Idx[0]][j]);
}
}
}
//lista nieustawionych elementow
List <Tuple <int, int> > notSet = new List <Tuple <int, int> >();
for (int row = 0; row < _n; row++)
{
for (int col = 0; col < _n; col++)
{
if (data.Data[row, col] == 0)
{
notSet.Add(new Tuple <int, int>(row, col));
}
}
}
//ustawienie brakujacych elementow
while (notSet.Count > 0)
{
int savedcnt = notSet.Count;
int p = 0;
while (p < notSet.Count)
{
int x = (data.SetInRow[notSet[p].Item1] | data.SetInCol[notSet[p].Item2]) ^ SkyscraperData_Perms.InitialValues[_n];
if (data.CountBits(x) == 1)
{
data.SetSingleElementMask(notSet[p].Item1, notSet[p].Item2, x);
notSet.RemoveAt(p);
}
else
{
p++;
}
}
if ((notSet.Count > 0) && (savedcnt == notSet.Count))
{
return(false);
}
}
return(true);
}
private int[][] ConvertToResultTable(SkyscraperData_Perms data)
{
int[][] res = new int[_n][];
for (int i = 0; i < _n; i++)
{
res[i] = new int[_n];
for (int j = 0; j < _n; j++)
{
res[i][j] = Array.IndexOf(SkyscraperData_Perms.Masks, data.Data[i, j]);
}
}
return(res);
}