import Foundation func readInt() -> Int { return Int(readLine()!)! } func readIntsArray() -> [Int] { return readLine()!.split(separator: " ").map { Int($0)! } } func main() { let n = readInt() var count = 0 var a = readIntsArray() for i in 0.. a[i+1] { a[i] = a[i+1] a[i+1] = a[i] count += 1 print(a) } } print(count) } main()