using System;

namespace MyCompiler {
    class Program {
        public static void Main(string[] args) {
            int N = Convert.ToInt32(Console.ReadLine());
            string []Codigos = new string [N];
            string aux, aux2;
            //bool repetido = false;

            for(int i=0; i < N;i++){
               Codigos[i] = Console.ReadLine();
               //System.Console.Write(Codigos[i]);
            }
            
            for(int x=0; x < Codigos.Length;x++){
                //System.Console.Write(Codigos[x]);
                  aux = Codigos[x];
                int aum = x+1;
                for(int j = aum ; j < Codigos.Length; j++){
                     aux2 = Codigos[j];
                     if(aux == aux2){
                        System.Console.WriteLine(aux);
                        //repetido = true;
                     }
                     
                }
                
            }
        }
    }
}

Embed on website

To embed this project on your website, copy the following code and paste it into your website's HTML: