using System using System Collections Generic using System Linq using

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace ConsoleApplication5
{
class Program
{
static void Main(string[] args)
{
int a = int.Parse(Console.ReadLine());
Console.WriteLine(Convert.ToString(a, 8));
}
}
}