horse-race

var numbers = ListBuffer[Int]()
for(i <- 0 until n) {
    val pi = readInt

    numbers.+=:(pi)
}

numbers = numbers.sorted

var smallestDifference = Int.MaxValue
for(i <- 1 until numbers.length) {
    if(abs(numbers(i) - numbers(i - 1)) < smallestDifference) {
        smallestDifference = abs(numbers(i) - numbers(i - 1))
    }
}