#include <iostream>
#include <vector>
#include <cstdio>
#include <sstream>
#include <map>
#include <string>
#include <algorithm>
#include <queue>
#include <cmath>

using namespace std;


int main(){
	int n;
	cin >> n;
	vector<int> m = {6,2,5,5,4,5,6,3,7,6};
	vector<int> dp(n+1, 0);
	string s;
	if(n%2 == 1){
		s += '7';
		n -= 3;
	}
	while(n>0){
		s += '1';
		n -= 2;
	}
	cout << s << endl;
	return 0;
}