class INPUT:
  def __init__(self):
    self.l=open(0).read().split()[::-1]
    self.length=len(self.l)
    return

  def stream(self,k=1,f=int,f2=False):
    assert(-1<k)
    m=self.length
    if m==0 or m<k:
      raise Exception("There is no input!")
    elif f!=str:
      if k==0:
        self.length=0
        return list(map(f,self.l[::-1]))
      if k==1 and not f2:
        self.length-=1
        return f(self.l.pop())
      if k==1 and f2:
        self.length-=1
        return [f(self.l.pop())]
      ret=[]
      for _ in [0]*k:
        ret.append(f(self.l.pop()))
      self.length-=k
      return ret
    else:
      if k==0:
        self.length=0
        return self.l[::-1]
      if k==1 and not f2:
        self.length-=1
        return self.l.pop()
      if k==1 and f2:
        self.length-=1
        return [self.l.pop()]
      ret=[]
      for _ in [0]*k:
        ret.append(self.l.pop())
      self.length-=k
      return ret
pin=INPUT().stream

"""
pin(number[default:1],f[default:int],f2[default:False])
if number==0 -> return left all
listを変数で受け取るとき、必ずlistをTrueにすること。
"""

def main():
  N=pin(1)
  A=pin(0)
  d1=[0]
  d2=[0]
  for i in A:
    if i==1:
      d1.append(d1[-1]+1)
    else:
      d1.append(d1[-1])
    if i==2:
      d2.append(d2[-1]+1)
    else:
      d2.append(d2[-1])
  ans=0
  for i in range(N):
    s1=d1[-1]-d1[i]#1の個数
    s2=d2[-1]-d2[i]#2の個数
    t=N-i-1-s1-s2#それ以外の個数
    if A[i]==1:
      ans+=s1*2+s2*3+t*2
    elif A[i]==2:
      ans+=s1*3+s2+t
    else:
      ans+=s1*2+s2+t
  print(ans)
  return

main()