package main

import (
    "bufio"
    "fmt"
    "strings"
    "os"
    "strconv"
)

var sc = bufio.NewScanner(os.Stdin)

func min(slices []int) int {
    var res = 1000000
    for _, v := range slices {
        if v < res { 
            res = v
        }
    }
    return res
}

func main(){
    var m int
    if sc.Scan() { 
        m, _ = strconv.Atoi(sc.Text())
    }
    arr := make([]string, m)
    if sc.Scan(){
        arr = strings.Fields(sc.Text())
    }
    arr_int := make([]int, m)
    for i, v := range arr{
        arr_int[i], _ = strconv.Atoi(v)
    }
    max := arr_int[len(arr_int)-1] - arr_int[0]
    distances := make([]int, m-1)
    for i := 0; i < len(arr_int)-1; i++ {
        distances[i] = arr_int[i+1] - arr_int[i]
    }
    fmt.Println(max)
    fmt.Println(min(distances))
}