remove adjacent duplicate characters
public static string GreatSolution(string s, int k)
{
Stack<int[]> stack = new Stack<int[]>();
foreach (char ch in s.ToCharArray())
{
if (stack.Count!=0 && stack.Peek()[0] == ch)
stack.Peek()[1]++;
else
stack.Push(new int[] { ch, 1 });
if (stack.Peek()[1] == k)
stack.Pop();
}
var sb = string.Empty;
while (stack.Count>0)
{
int[] top = stack.Pop();
while (top[1]-- > 0)
sb = ((char)top[0]).ToString() +sb;
}
return sb.ToString();
}
// put the value of k as per required