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