#include <iostream>

using namespace std;

int main(int argc, const char* argv[])
{
	int N;
	cin >> N;
	//	int M[10] = {6, 2, 5, 5, 4, 5, 6, 3, 7, 6};
	if (N % 2 == 1) {
		cout << 7;
		N -= 3;
	}
	for (int i = 0; i < N / 2; i++) {
		cout << 1;
	}
	return 0;
}