#include <iostream>
using namespace std;

int main() {
	int a,i;
	long long int b;
	cin >> a;
	if(a==0 || a==1){cout << "0";}
	else if(1==a%2){cout << 7;
		for(i=3;i<a;i=i+2){
			cout << 1;
		}
	}
	else if(0==a%2){cout << 1;
		for(i=2;i<a;i=i+2){
		cout << 1;
		}
	}
	cout << endl;
	return 0;
}