Created
October 15, 2021 01:28
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Задача: Преобразование лицензионного ключа
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using System; | |
using System.Linq; | |
using System.Collections.Generic; | |
public class Program | |
{ | |
public static string UpdateLicenseKeyFormat(string s, int k) | |
{ | |
int len = s.Length; | |
int letterCount = s.Count(c => c != '-'); | |
var result = new List<char>(); | |
int curK = 0; | |
for (int i = len - 1; i >= 0; i--) | |
{ | |
// время поставить '-' | |
if (curK == k && letterCount > 0) | |
{ | |
result.Add('-'); | |
curK = 0; | |
} | |
// иначе считаем текущий символ | |
if (s[i] != '-') | |
{ | |
result.Add(char.ToUpper(s[i])); | |
curK++; | |
letterCount--; | |
} | |
} | |
result.Reverse(); | |
return new string(result.ToArray()); | |
} | |
public static void Main() | |
{ | |
Console.WriteLine("UniLecs"); | |
// tests | |
Console.WriteLine(UpdateLicenseKeyFormat("5F3Z-2e-9-w", 4)); // 5F3Z-2E9W | |
Console.WriteLine(UpdateLicenseKeyFormat("2-5g-3-J", 2)); // 2-5G-3J | |
} | |
} |
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