Military Time Problem

Question

My Code below does not solve the puzzle, only 2 out of 5 tests passes! What am I doing wrong?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Globalization;
namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
DateTimeFormatInfo fi = new CultureInfo( "en-US", false ).DateTimeFormat;
string StrAmPm = Console.ReadLine();
DateTime myTime = DateTime.ParseExact(StrAmPm.ToUpper(), "hh:mm tt", fi);
Console.WriteLine(myTime.ToString("HH:mm"));
}
}
}

Answer 1

Hello! I detect the problem.
1:45 AM = 01:45 ≠ 1:45
// New code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
var text = Console.ReadLine();
if (text.EndsWith(" AM")) {
string result = text.Substring(0, text.Length - 3);
if (result.Split(":")[0].Length == 1) {
result = "0" + result;
}
Console.Write(result );
} else {
text = text.Substring(0, text.Length - 3);
string[] times = text.Split(":");
times[0] = Convert.ToString(int.Parse(times[0]) + 12);
if (times[0] == "24") {
times[0] = "0";
}
Console.Write(times[0] + ":" + times[1]);
}
}
}
}

Answer 2

I have this code (DateTime alternative) and the same problem:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{
var text = Console.ReadLine();
if (text.EndsWith(" AM")) {
Console.Write(text.Substring(0, text.Length - 3));
} else {
text = text.Substring(0, text.Length - 3);
string[] times = text.Split(":");
times[0] = Convert.ToString(int.Parse(times[0]) + 12);
if (times[0] == "24") {
times[0] = "0";
}
Console.Write(times[0] + ":" + times[1]);
}
}
}
}

Answer 3

Ok! Maybe there is a problem in the tests or instructions is missing.