# 1470 Mex Sum

from sys import stdin

def mex1(j):
    if j==2:
        return 3
    else:
        return 2
def mex2(j):
    if j==1:
        return 3
    return 1
def mex3(j):
    if j==1:
        return 2
    return 1

n=int(stdin.readline())
a=list(map(int,stdin.readline().split()))

sum=0
for i in range(n-1):
    if a[i]==1:
        for j in range(i+1,n):
            sum+=mex1(a[j])
    elif a[i]==2:
        for j in range(i+1,n):
            sum+=mex2(a[j])
    else:
        for j in range(i+1,n):
            sum+=mex3(a[j])
print(sum)