Previously, thousands of South Koreans took to the streets, week after week, to protest a sprawling corruption scandal that shook the top echelons of business and government. Park Geun-hye, the daughter of the Cold War military dictator Park Chung-hee, was the nation’s first female president. Ms. Park’s powers were suspended in December after a legislative impeachment vote, though she continued to live in the presidential Blue House awaiting the decision by the Constitutional Court. In central Seoul, some people danced to celebrate their victorious revolt against an unpopular leader, with loudspeakers blaring, “All the power of the Republic of Korea comes from the people!” There was no immediate reaction from Ms. Park. the country must elect a new president within 60 days. The acting president, Hwang Kyo-ahn, an ally of Ms. Park’s, will remain in office in the interim.