#include <iostream>
#include <vector>

using namespace std;

int main()
{
	//              0, 1, 2, 3, 4, 5, 6, 7, 8, 9 
	//vector<int>d{ 6, 2, 5, 5, 4, 5, 6, 3, 7, 6 };
	int N;
	cin >> N;

	cout << ( N%2==0? "1" : "7" );
	for( int i = 0; i < N/2-1; i ++ ) {
		cout << "1" ;
	}
	cout << endl;

	return 0;
}