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- using System;
- class CheckPrime
- {
- static void Main()
- {
- int n = int.Parse(Console.ReadLine());
- bool isPrime = true;
- if (n < 2)
- {
- isPrime = false;
- }
- for (int i = 2; i <= Math.Sqrt(n); i++)
- if (n % i == 0)
- {
- isPrime = false;
- break;
- }
- if (isPrime)
- {
- Console.WriteLine("Prime");
- }
- else
- Console.WriteLine("Not prime");
- }
- }
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