#include <iostream>
using namespace std;

int main(){
	int a = 0;
	int b = a;
	cin >> a;

	if (a >= 2)
	{
		if (a % 2 == 1)
		{
			cout << 7;
			a -= 3;
		}
		if (a % 2 == 0 && a > 0)
		{
			for (int i = 0; i < a / 2; i++)
			{
				cout << 1;
			}
		}
	}
	cout << endl;
	return 0;
}