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
    x = scan()
  if x==2:
    echo 1000000
  else:
    var
      ans = 0.0
      res = 0.0
    for i in 2..1000000:
      res = 0
      res+=pow(i.float,(1-x).float)
      res = res / (i-1).float
      ans+=res
    ans*=1000000
    echo ans.floor.int
    
    
  
solve()