#include <bits/stdc++.h>
using namespace std;

int main()
{
int i;
int X;
int N;

	cin >> N;

	if( N % 2 == 0 )
	{
		X = N / 2;
	}
	else
	{
		cout << "7";
		X = N / 2 - 1;
	}

	for( i = 0; i < X; i++ ) cout << "1";

	cout << endl;

	return 0;
}