# 1470 Mex Sum

from sys import stdin

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

sum=0
for i in range(n-1):
    if a[i]==1:
        for j in range(i+1,n):
            if a[j]==2:
                sum+=3
            else:
                sum+=2
    elif a[i]==2:
        for j in range(i+1,n):
            if a[j]==1:
                sum+=3
            else:
                sum+=1
    else:
        for j in range(i+1,n):
            if a[j]==1:
                sum+=2
            else:
                sum+=1
print(sum)