South Korean President Park Geun-hye maintained a firm but flexible stance on North Korea Monday, saying she will not tolerate the communist nation\'s nuclear weapons or provocations but will still leave open a \"window\" for dialogue, her spokeswoman said. \"Not only is there nothing to gain from provocations, but provocations must also come with a price,\" spokeswoman Kim Haing said in a statement, quoting the president during her meeting with former US Secretary of State Colin Powell.