{}
using System;
using System.Collections.Generic;
using System.Linq;
class Program
{
static Dictionary<char, int> ListToCountDict(List<char> l)
{
Dictionary<char, int> counts = new Dictionary<char, int>();
foreach (char item in l)
{
if (counts.ContainsKey(item))
{
counts[item]++;
}
else
{
counts[item] = 1;
}
}
return counts;
}
static void Main()
{
string str = "aqaswasldkaslfaslyetdop";
var duplLetters = new HashSet<char>(ListToCountDict(str.ToList()).Where(kvp => kvp.Value > 1).Select(kvp => kvp.Key));
string resS = new string(str.Where(s => !duplLetters.Contains(s)).ToArray());
List<int> binaryDup = str.Select(s => duplLetters.Contains(s) ? 1 : 0).ToList();
int max = 0;
int cur = 0;
foreach (int b in binaryDup)
{
if (b == 0)
{
cur = 0;
}
else
{
cur += b;
}
if (cur > max)
{
max = cur;
}
}
Console.WriteLine($"Result String: {resS}, Max: {max}");
}
}