Electoral system for the president
Ukraine
OSCE/ODIHR Election Observation Mission, Ukraine Presidential Elections 31 March 2019, Interim Report (6 February–7 March 2019), accessed 13 July 2019
“The president of Ukraine is elected by popular vote for a five-year term; the same person may not serve more than two consecutive terms, but there is no overall term limit. If no candidate wins the absolute majority of valid votes cast, a second round takes place three weeks later between the two candidates who won the most votes.”