Submission #1446752

---

Source Code Expand

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
class Program
{
    public static bool f = false, t = true;
    static void Main(string[] args)
    {
        long[] n = Console.ReadLine().Split().Select(long.Parse).ToArray();
        long[] a = Console.ReadLine().Split().Select(long.Parse).ToArray(); bool ooki = false;
        for (long i = 0; i < a.Length; i++) { if (a[i] == n[1]) { Console.WriteLine("POSSIBLE"); return; } if (a[i] > n[1] && !ooki) { ooki = true; } }
        if (!ooki) { Console.WriteLine("IMPOSSIBLE"); return; }
        bool dekita = f;
        for (long i = 0; i < a.Length; i++)
        {
            for (long k = 0; k < a.Length && i != k; k++)
            {
                if (gcm(a[i],a[k])==1) { Console.WriteLine("POSSIBLE"); dekita = t; break; }
            }
            if (dekita) { break; }
            if (i == a.Length - 1) { Console.WriteLine("IMPOSSIBLE"); }
        }
        Console.ReadLine();

    }

    public static long gcm(long a, long b)
    {
        while (true)
        {
            if (a == 0) { return b; }
            if (b == 0) { return a; }
            if (a > b) { a -= b; }
            else { b -= a; }
        }
    }
    public static long lcm(long a, long b)
    {
        return a * b / gcm(a, b);
    }
    public static bool IsPrime(long n)
    {
        if (n < 2) return false;
        if (n == 2) return true;

        for (long i = 2; i < n; i++)
        {
            if (n % i == 0) return false;
        }
        return true;
    }

}
public static class Read
{
    public static void outl(string n = "") { Console.WriteLine(n); return; }
    public static long Long()
    {
        return long.Parse(Console.ReadLine());
    }
    public static long[] longs()
    {
        return Console.ReadLine().Split().Select(long.Parse).ToArray();
    }
    public static int Int()
    {
        return int.Parse(Console.ReadLine());
    }
    public static int[] ints()
    {
        return Console.ReadLine().Split().Select(int.Parse).ToArray();
    }
    public static string Str() { return Console.ReadLine(); }
    public static string[] Strs() { return Console.ReadLine().Split(); }
}

Submission Info

Judge Result