题解 | KiKi求质数个数

using System;
public class Program {
    public static void Main() {
        int n = 0;
        for (int i = 100; i < 1000; i++){
            bool b = true;
            for (int j = 2; j < i; j++){
                if (i % j == 0){
                    b = false;
                    break;
                }
            }
            if (b){
                n++;
            }
        }
        Console.WriteLine(n);
    }
}