#include <bits/stdc++.h>
#define fastIO (cin.tie(0), cout.tie(0), ios::sync_with_stdio(false))
#define precise(i) fixed << setprecision(i)
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using namespace std;

int main() {
  fastIO;

  int n;
  cin >> n;

  if (n % 2 == 1) {
    cout << 7;
    n -= 3;
  }
  for (int i = 0; i < n / 2; ++i) {
    cout << 1;
  }
  cout << '\n';

  return 0;
}