#include<iostream>
#include<math.h>
#include<string>
#include<algorithm>
using namespace std;

#define rep0(n) for(int i=0;i<n;i++)
#define rep(n) for(int i=1;i<=n;i++)

double const pi=3.1415926535;

int printint(int n){
	cout<<n<<endl;
	return 0;
}

int prints(string s){
	cout<<s<<endl;
	return 0;
}

int main(){
	int n;
	cin>>n;
	if(n%2==0){
		rep(n/2)cout<<1;
		cout<<endl;
	}
	else{
		n-=3;
		cout<<7;
		if(n==0)cout<<endl;
		else{
			rep(n/2)cout<<1;
			cout<<endl;
		}
	}
	return 0;
}