from random import randint
A = [randint(1, 1000) for i in range(1000)]
count = 0
for i in range(len(A)):
    for j in range(i + 8, len(A)):
        if abs(A[i] - A[j]) % 999 == 0:
            count += 1
print(count)

k = [0] * 999
count = 0
q = A[:7]
for i in range(7, len(A)):
    x = A[i]
    ost = x % 999
    count += k[ost]
    k[q[0] % 999] += 1
    q.append(x)
    q.pop(0)
print(count)