n=int(input())
a=list(map(int, input().split()))
count=0
for i in range(n):
for item in a[:i] + a[i+1:]:
if abs(item-a[i])==1:
count+=1
print(int(count/2))
n=int(input())
a=list(map(int, input().split()))
count=0
for i in range(n):
for item in a[:i] + a[i+1:]:
if abs(item-a[i])==1:
count+=1
print(int(count/2))