import times, strutils, sequtils, math, algorithm, tables, sets, lists, intsets
import critbits, future, strformat, deques
template `max=`(x,y) = x = max(x,y)
template `min=`(x,y) = x = min(x,y)
template `mod=`(x,y) = x = x mod y
template scan2 = (scan(), scan())
template scan3 = (scan(), scan())
let read* = iterator: string {.closure.} =
    while true: (for s in stdin.readLine.split: yield s)
proc scan(): int = read().parseInt
proc scanf(): float = read().parseFloat
proc toInt(c:char): int =
    return int(c) - int('0')



proc solve()=
  var
    n = scan()
    a = newseqwith(n,scanf())
    ans = newseqwith(n,0.0)

  proc lsq():(float,float)=
    var
      sum_xk_yk:float = 0.0
      sum_xk:float = 0.0
      sum_yk:float = 0.0
      sum_xk_xk:float = 0.0
      resa:float
      resb:float
    for k  in 0..<n:
      sum_xk_yk += a[k]*((k).float)
      sum_xk += (k).float
      sum_yk += a[k]
      sum_xk_xk += ((k)^2).float
    resa = (n.float*sum_xk_yk-sum_xk*sum_yk) / (n.float*sum_xk_xk-sum_xk*sum_xk)
    resb = (sum_xk_xk*sum_yk-sum_xk_yk*sum_xk) / (n.float*sum_xk_xk-sum_xk*sum_xk)
    return (resa,resb)
  var
    (resa,resb) = lsq()
  for i in 0..<n:
    ans[i] = (resa*(i).float+resb-a[i])^2
  
  #echo resa
  echo resb, " ", resa
  echo ans.sum()



  
solve()