#include"bits/stdc++.h"
using namespace std;
int main() {
	int n; cin >> n;
	if (n % 2 == 0) {
		for (int i = 1; i <= n / 2; i++)cout << 1;
		cout << endl;
	}
	else {
		cout << 7;
		for (int i = 1; i <= n / 2 - 1; i++)cout << 1;
		cout << endl;
	}
}