leetcode539

public class Solution {
    public int FindMinDifference(IList<string> timePoints) {
        var ary = new int[ * ];
            foreach (var time in timePoints)
            {
                var tp = time.Split(':');
                var hour = tp[];
                var minute = tp[];

                var h = Convert.ToInt32(hour[].ToString()) *  + Convert.ToInt32(hour[].ToString());
                var m = Convert.ToInt32(minute[].ToString()) *  + Convert.ToInt32(minute[].ToString());

                var index = h *  + m;
                if (ary[index] == )
                {
                    return ;
                }
                else
                {
                    ary[index] = ;
                }
            }
            var min = int.MaxValue;

            bool first = true;
            var firstNum = int.MaxValue;
            var lastNum = int.MinValue;
            var pre = ;
            for (int i = ; i < ary.Length; i++)
            {
                if (ary[i] == )
                {
                    if (first)
                    {
                        pre = i;
                        first = false;
                        firstNum = i;
                        continue;
                    }
                    var diff = Math.Abs(i - pre);
                    if (diff >  / )
                    {
                        diff =  - diff;
                    }
                    if (min > diff)
                    {
                        min = diff;
                    }
                    pre = i;
                    lastNum = i;
                }
            }

            min = Math.Min(min, ( *  - lastNum + firstNum));

            return min;
    }
}

https://leetcode.com/problems/minimum-time-difference/#/description