public class Solution    {        public bool CheckRecord(string s)        {            var Absent = 0;            var MaxLate = 0;            var ContiLate = 0;            var preChar = '\0';            for (int i = 0; i < s.Length; i++)            {                var c = s[i];                if (c == 'A')                {                    Absent++;                    preChar = c;                    if (MaxLate < ContiLate)                    {                        MaxLate = ContiLate;                    }                    ContiLate = 0;                }                else if (c == 'L')                {                    if (ContiLate == 0)                    {                        ContiLate = 1;                        preChar = c;                    }                    else                    {                        if (preChar == c)                        {                            ContiLate++;                            preChar = c;                        }                        else                        {                            ContiLate = 0;                            preChar = c;                        }                    }                }                else                {                    if (MaxLate < ContiLate)                    {                        MaxLate = ContiLate;                    }                    ContiLate = 0;                }            }            if (MaxLate < ContiLate)            {                MaxLate = ContiLate;            }            if (Absent > 1 || MaxLate > 2)            {                return false;            }            else            {                return true;            }        }    }