1using System;
2using System.Collections.Generic;
3
4public class MinimumTimeDifference {
5    private static int TimeToMinutes(string time) {
6        int hours = int.Parse(time.Substring(0, 2));
7        int minutes = int.Parse(time.Substring(3, 2));
8        return hours * 60 + minutes;
9    }
10
11    public static int FindMinDifference(IList<string> timePoints) {
12        List<int> minutes = new List<int>();
13        foreach (var time in timePoints) {
14            minutes.Add(TimeToMinutes(time));
15        }
16
17        minutes.Sort();
18
19        int minDiff = int.MaxValue;
20        for (int i = 1; i < minutes.Count; ++i) {
21            minDiff = Math.Min(minDiff, minutes[i] - minutes[i - 1]);
22        }
23
24        int wrapAroundDiff = minutes[0] + 1440 - minutes[minutes.Count - 1];
25        minDiff = Math.Min(minDiff, wrapAroundDiff);
26
27        return minDiff;
28    }
29
30    public static void Main() {
31        List<string> timePoints = new List<string> { "23:59", "00:00" };
32        Console.WriteLine(FindMinDifference(timePoints));
33    }
34}

1