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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_ui1hrnjvf310h3bptovbc5vlae, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
sclass ReverseChain<A> {
  A element;
  ReverseChain<A> prev;
  int size;
  
  *() {}
  *(ReverseChain<A> *prev, A *element) {
    size = prev != null ? prev.size+1 : 1;
  }
  
  toString {
    ret str(toList());
  }
  
  L<A> toList() {
    L<A> l = emptyList(size);
    for i to size: l.add(null);
    int i = size;
    ReverseChain<A> c = this;
    while (c != null) {
      l.set(--i, c.element);
      c = c.prev;
    }
    ret l;
  }
}