N=int(input())
S=str(input())

arr=[0,0,0,0,0,0,0,0,0,0]

for i in range(N):
  arr[int(S[i])]+=1

allN=0

for i in range(10):
  allN+=i*(arr[i]%120)*40
  allN%=120

check=[]

for i in range(10):
  for j in range(10):
  	for k in range(10):
  	  if i==j and j==k and arr[i]<3:
  	  	continue
  	  if (i==j and arr[i]<2) or (j==k and arr[j]<2) or (k==i and arr[k]<2):
  	  	continue
  	  if arr[i]<1 or arr[j]<1 or arr[k]<1:
  	  	continue
  	  check.append((allN -i*1 -j*10 -k*100)%120)

check.sort()

count=1
temp=check[0]

for i in range(1, len(check)):
  if temp!=check[i]:
  	count+=1
  	temp=check[i]

print(count)