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- using System;
- namespace _05._Invalid_Number
- {
- class Program
- {
- static void Main(string[] args)
- {
- int number = int.Parse(Console.ReadLine());
- //валидно: [100…200] или е 0 -> print
- //невалидно -> print invalid
- bool isValid = (number >= 100 && number <= 200) || number == 0;
- //isValid = true -> числото е валидно -> print nothing
- //isValid = false -> числото не е валидно -> print invalid
- if (isValid == false)
- {
- Console.WriteLine("invalid");
- }
- }
- }
- }
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