#include<stdio.h>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <queue>
#include <stack>
#include <algorithm>
#include <sstream>
#include <iostream>
#include <string>
#include <stdio.h>

using namespace std;

int main() {

	int N;
	cin >> N;

	if (N < 4) {
		if (N == 2) cout << 1;
		if (N == 3) cout << 7;
	}
	else {
		for (int i = 0; i < N / 2; i++) cout << 1;
	}
	cout << endl;

	return 0;
}