#include <iostream>

using namespace std;

int main() {
  int n;
  cin >> n;
  if (n % 2 > 0) {
    cout << 7;
    n -= 3;
  }
  for (int i = 0; i < n / 2; ++i) {
    cout << 1;
  }
  cout << endl;
  return 0;
}