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