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