#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  if (n <= 2) cout << -1;
  if (n == 3) cout << 210;
  if (n >= 4) {
    string s = "1";
    int sign;
    int z = 0;
    if (n % 3 == 0) z = 100;
    if (n % 3 == 1) z = 1;
    if (n % 3 == 2) z = 10;
    if (((n - 1) / 3) % 2 == 0)
      sign = 1;
    else
      sign = -1;
    for (int i = 1; i < n; i++) s += "0";
    bool OK = false;
    for (char i = '0'; i <= '9'; i++) {
      for (char j = '0'; j <= '9'; j++) {
        s[n - 2] = j;
        s[n - 3] = i;
        if (((1 + s[n - 2] - '0' + s[n - 3] - '0') % 3 == 0) &&
            (((s[n - 3] - '0') * 100 + (s[n - 2] - '0') * 10 + z * sign) % 7 ==
             0)) {
          cout << s;
          OK = true;
          break;
        }
      }
      if (OK) break;
    }
  }
}
