#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=a;i<b;i++)

int N;

int main()
{
	cin.tie(0);
	ios::sync_with_stdio(false);

	while (cin >> N)
	{
		rep(i, 0, N / 2 - 1) cout << "1";
		if (N % 2 == 0)
			cout << "1";
		else
			cout << "7";
		cout << endl;
	}
}