#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <cstdlib>
#include <ctime>
#include <cstdio>
#include <functional>
#include <set>
#include <cstring>

using namespace std;

int main()
{	
	int n;
	cin>>n;

	string s;
	while(n>3){n-=2; s+='1';}
	if(n==3) s+='7';
	else s+='1';
	cout<<s<<endl;

	return 0;

}