o0=o1=o2=o3=o4=o5=0

f = open('fileB.txt')

n = int(f.readline())

for i in range(n):
    x = int(f.readline())
    if x % 6 == 0:
        o0+=1
    if x % 6 == 1:
        o1+=1
    if x % 6 == 2:
        o2+=1
    if x % 6 == 3:
        o3+=1
    if x % 6 == 4:
        o4+=1
    if x % 6 == 5:
        o5+=1

s = (n*(n-1)//2)-(o1*o5+o2*o4+o0*(o0-1)//2+o3*(o3-1)//2)

print(s)