private long FindResult(int currentLength, WallSection wallSection)
{
if(currentLength == length) {
return 1;
}
String key = wallSection.GetKey() + currentLength;
if (store.ContainsKey(key)) {
return (long)store[key];
}
List<WallSection> children = wallSection.GetChildren();
long result = 0;
for (int i = 0; i < children.Count; i++) {
result += FindResult(currentLength + 1, children[i]);
}
store.Add(key, result);
return result;
}
