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()
    digit = n.div(2)
    dp = newseqwith(digit,0)
    md = 10^9+7

  if n==1:
    echo 2
    return
  # 0,1,6,8,9
  
  dp[0]=4
  for d in 1..<digit:
    dp[d]=(dp[d-1]*5).mod(md)
  
  if n.mod(2)==0:
    echo dp[digit-1]
  else:
    echo ((dp[digit-1])*3).mod(md)


    
  
solve()