/// <summary>
/// Returns message constructed from least frequent character in each column in columns
/// </summary>
/// <returns></returns>
public string PartTwo()
{
for (int i = 0; i < columns.Length; i++)
{
message += AlphaFreqDict.GetLeastFrequentCharacter(columns [i]);
}
return(message);
}
/// <summary>
/// Uses checksum to determine whether roomName is real
/// </summary>
/// <param name="roomName">full name of a single room</param>
/// <returns>returns true if room is real, false if not</returns>
bool IsRealRoom(string roomName)
{
string checkSum = GetCheckSum(roomName);
Dictionary <char, int> letterFrequencies = AlphaFreqDict.GetLetterFrequencyDictionary();
for (int i = 0; i < roomName.Length; i++)
{
if (char.IsLetter(roomName [i]))
{
letterFrequencies [roomName [i]]++;
}
if (char.IsNumber(roomName [i]))
{
break;
}
}
for (int i = 0; i < AlphaFreqDict.alphabet.Length; i++)
{
if (letterFrequencies [AlphaFreqDict.alphabet [i]] == 0)
{
letterFrequencies.Remove(AlphaFreqDict.alphabet [i]);
}
}
List <KeyValuePair <char, int> > sortable = letterFrequencies.ToList();
sortable.Sort(
delegate(KeyValuePair <char, int> pair1, KeyValuePair <char, int> pair2)
{
int count = pair1.Value.CompareTo(pair2.Value);
if (count != 0)
{
return(count);
}
else
{
return(-pair1.Key.CompareTo(pair2.Key));
}
});
sortable.Reverse();
for (int i = 0; i < checkSum.Length; i++)
{
if (checkSum [i] != sortable [i].Key)
{
return(false);
}
}
return(true);
}
