#include <iostream>
using namespace std;
int main()
{
  int length;
  int* chain;
  
  length << cin
  chain= new int[length];
  
  for(int i = 0; i < length; i++)
    chain[i] << cin;
  
  for(int i = 0; i < length; i++)
  	cout << chain[i];
 }