#include<iostream>
using namespace std;

int main(){
	int n;
	cin >> n;
	
	if(n%2==1)
		cout << "7";
	else
		cout << "1";
	n -= 2;
	while(n>1){
		cout << "1";
		n -= 2;
	}
	cout << endl;

	return 0;
}