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 comb(n,k:int,m:int):int=
  var
    dp = newseqwith(2,newseqwith(n+1,0))

  for i in 0..1:
    dp[i][0]=1
  for i in 1..n:
    var p = i.mod(2)
    var lp = (i+1).mod(2)
    for j in 1..<n:
      dp[p][j] = (dp[lp][j-1]+dp[lp][j]).mod(m)
  #echo dp.join("\n")
  return dp[n.mod(2)][k]






proc solve():int=
  var
    n = scan().div(1000) # 千円札の枚数
    m = scan()
    md = 10^9
    yojou = n.mod(m)
  return comb(m,yojou,md)


  
echo solve()