#include<iostream>
using namespace std;
#define REP(i, a, n) for(int i=a; i<n; i++)

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

	if (N % 2 == 0) {
		REP(i, 0, N / 2) cout << 1;
	}
	else {
		cout << 7;
		REP(i, 0, N / 2 - 1) cout << 1;
	}
	cout << endl;

	return 0;
}