Romanian President Klaus Iohannis said on Friday it was clear that British Prime Minister Theresa May was "more positive and result-oriented" after she addressed European Union leaders over a dinner in Brussels on Brexit. "If somebody says that the negotiations got stuck - they didn't get stuck," he told reporters. "It's just that the negotiations have not fostered enough progress." "My hope is that, in the end, we will reach sufficient progress on all three chapters ... It's obvious that everybody is looking for a success story. Nobody tries to block the negotiations," he said, adding that there was "absolutely no guarantee" both sides would arrive at a deal by December.