#include <iostream>
#include <vector>

using namespace std;

int main()
{
  int n;
  cin >> n;
  if ( n % 2 == 1 )
  {
	cout << 7;
	n -= 3;
  }
  for( int i = 0; i < n / 2; i++ )
  {
	cout << 1;
  }
  cout << endl;
}