#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n % 2 == 1 && n >= 3) {
    n -= 3;
    cout << 7;
  }
  while (n) {
    cout << 1;
    n -= 2;
  }
  return 0;
}
