#include <iostream>
#include <numeric>
#include <algorithm>
#include <string>
#include <vector>
#include <cmath>
#include <queue>

#define rep(i, a) FOR(i, 0, a)
#define FOR(i, a, b) for(int i = a; i < b; ++i)

typedef long long ll;
typedef unsigned long long ull;
typedef std::pair<int, int> P;

int main(){
	int n;
	std::cin >> n;
	if (n == 2)std::cout << "1" << std::endl;
	else if (n == 3)std::cout << 7 << std::endl;
	else {
		std::string str;
		rep(i, n / 4)str += "11";
		if (n % 4 != 0)str.pop_back(), str += "7";
		std::cout << str << std::endl;
	}
	return 0;
}