#include <bits/stdc++.h>

using namespace std;

typedef pair<int,int> P;
typedef pair<int,pair<int,int>> PP;
typedef long long ll;

const double EPS = 1e-8;
const int INF = 1e9;
const int MOD = 1e9+7;

int dy[] = {0,1,0,-1};
int dx[] = {1,0,-1,0};

int main(void) {
	int need[] = {6,2,5,5,4,5,6,3,7,6};

	int n;
	cin >> n;

	if(n == 3){
		cout << 7 << endl;
		return 0;
	}

	string s;
	while(n >= 2){
		s += '1';
		n -= 2;
	}

	if(n == 1)s[0] = '7';
	cout << s << endl;	


	return 0;
}