import java.io.BufferedReader
import java.io.InputStreamReader
import kotlin.math.roundToInt
 
fun main(args: Array<String>) {
    var br = BufferedReader(InputStreamReader(System.`in`))
    // br 사용 선언
    var input: Int = br.readLine().toInt()
    // 크기 입력받기
    val arr = mutableListOf<Int>()
    // 값을 담을 리스트
    var everage: Int = 0
    // 기본값을 0으로 줌
 
    if (input != 0) {
        // 입력이 0이 아닐경우 실행
 
        for (i: Int in 0 .. input - 1) {
            var RQ: Int = br.readLine().toInt()
            // 입력을 받고
                arr.add(i, RQ)
            // 리스트의 i번째에 그 값을 할당
                everage = everage + RQ
            // everage의 값을 기존값 + RQ로 지정
        }
 
        var min: Int = arr[0]
        // 일단, 기본값을 arr[0]으로 지정하기
        var j: Int = 0
 
        if (arr.size > 1) {
            // 값이 하나일 경우 이 조건문 진입차단
            while (true) {
                // 무한반복
                if (arr[0] == arr[1]) {
                    // 만약 0번째 값과 1번째 값이 같은경우
                    break
                    // 반복문 탈출
                }
                if (arr[j] != arr[j + 1]) {
                    // j번째값과 j + 1번째 값이 다른경우
                    min = arr[j]
                    // min의 값을 j로 지정
                    break
                    // 반복문 탈출
                }
                j++
            }
        }
 
        arr.sort()
        // 모든 값을 정렬해줌
 
        var k: Int = arr.size - 2 // k의 값 지정,
        if (arr.size > 1 && arr[k - 1] == arr[k] && arr[k] == arr[k + 1]) {
            // 상기 조건을 모두 만족시킨다면
            min = arr[k - 1]
            // min의 값을 지정(수가 5,5,4,4,3,3,-1로 주어진 경우)
        }
 
        println((everage.toDouble() / input.toDouble()).roundToInt())
        // 평균 (반올림을 해줌)
        println(arr[arr.size / 2])
        // 중앙값
        println(min)
        // 위에서 지정해준 최빈값
        println(arr[input - 1] - arr[0])
        // 범위
    }
}

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