import strutils
 
let read* = iterator: string =
  while true: (for s in stdin.readLine.split: yield s)
 
template input*(T: static[typedesc]): untyped = 
  when T is int: read().parseInt
  elif T is float: read().parseFloat
  elif T is string: read()
  elif T is char: read()[0]

let N, M = input(int)
if N <= M:
  echo 0
else:
  var res = 1
  for i in 1 .. N:
    res = res * i mod M
  echo res