1#include <stdio.h>
2#include <stdlib.h>
3#include <limits.h>
4
5int timeToMinutes(const char* time) {
6    int hours = (time[0] - '0') * 10 + (time[1] - '0');
7    int minutes = (time[3] - '0') * 10 + (time[4] - '0');
8    return hours * 60 + minutes;
9}
10
11int compare(const void* a, const void* b) {
12    return *((int*)a) - *((int*)b);
13}
14
15int findMinDifference(char** timePoints, int timePointsSize) {
16    int* minutes = (int*)malloc(sizeof(int) * timePointsSize);
17    for (int i = 0; i < timePointsSize; ++i)
18        minutes[i] = timeToMinutes(timePoints[i]);
19
20    qsort(minutes, timePointsSize, sizeof(int), compare);
21
22    int minDiff = INT_MAX;
23    for (int i = 1; i < timePointsSize; ++i) {
24        int diff = minutes[i] - minutes[i - 1];
25        if (diff < minDiff) minDiff = diff;
26    }
27
28    int wrapAroundDiff = minutes[0] + 1440 - minutes[timePointsSize - 1];
29    if (wrapAroundDiff < minDiff) minDiff = wrapAroundDiff;
30
31    free(minutes);
32    return minDiff;
33}
34
35int main() {
36    char* timePoints[] = {"23:59", "00:00"};
37    int size = 2;
38    printf("%d\n", findMinDifference(timePoints, size));
39    return 0;
40}

1using System.Collections.Generic;

public class MinimumTimeDifference {
    private static int TimeToMinutes(string time) {
        int hours = int.Parse(time.Substring(0, 2));
        int minutes = int.Parse(time.Substring(3, 2));
        return hours * 60 + minutes;
    }

    public static int FindMinDifference(IList<string> timePoints) {
        bool[] minutes = new bool[1440];
        foreach (var time in timePoints) {
            int minute = TimeToMinutes(time);
            if (minutes[minute]) return 0;
            minutes[minute] = true;
        }

        int first = -1, last = -1, prev = -1, minDiff = 1440;
        for (int i = 0; i < 1440; ++i) {
            if (minutes[i]) {
                if (first == -1) first = i;
                if (prev != -1) minDiff = Math.Min(minDiff, i - prev);
                prev = i;
                last = i;
            }
        }
        minDiff = Math.Min(minDiff, first + 1440 - last);

        return minDiff;
    }

    public static void Main() {
        List<string> timePoints = new List<string> { "23:59", "00:00" };
        Console.WriteLine(FindMinDifference(timePoints));
    }
}