Problem in new driver's license challenge

Question

This code fails in case 3 and 5 I solved the problem using for loop but I think this code is correct too

Code:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
class Program
{
private static void Main()
{
string name = Console.ReadLine();
int agentsnumber = int.Parse(Console.ReadLine());
string others = Console.ReadLine();
List<string> names = others.Split(new char[]{' '},StringSplitOptions.RemoveEmptyEntries).ToList();
names.Add(name);
names.Sort();
Console.WriteLine(names.IndexOf(name) + 1);
float index= (float)(names.IndexOf(name) + 1) / agentsnumber;
Console.WriteLine(Convert.ToInt32(index)*20);
}
}
}

Can any one tell me where I am wrong ?
Thankyou in advance

Answer 1

Use Math.Ceiling instead of Convert.ToInt32 in your output.

Console.WriteLine(Math.Ceiling(index)*20);

Convert.ToInt32 rounds up and down. You need up, because you have to wait no matter how many others are in your time slot.

Answer 2

Thank you for your quick answer