#include <bits/stdc++.h>

using namespace std;

int main(int argc, char** argv)
{
	//1 = 2, 7 = 3
	int n; cin >> n;
	if (n == 2) {
		cout << "1";
	}
	else if (n == 3) {
		cout << "7";
	}
	else {
		if (n%2==0) {
			cout << "1";
		} else {
			cout << "7";
		}
		int keta = (n / 2);
		for (int ii=1; ii<keta; ++ii) {
			cout << "1";
		}
	}
	cout << endl;

}