n = int(input())
A = list(map(int, input().split()))

L = []
seq_num = 1
curr = A[0]
for i in range(1, n):
    if A[i - 1] != A[i]:
        seq_num += 1
    else:
        L.append((seq_num, curr))
        seq_num = 1
        curr = A[i]
    if i == n - 1:
        L.append((seq_num, curr))
ans = 0
l = len(L)
for i in range(l):
    seq_num, f = L[i]
    if f == 0:
        seq_num -= 1
    if i == l - 1:
        seq_num -= 1
    if seq_num <= 0:
        continue
    if seq_num % 2 == 0:
        num = seq_num // 2
        ans += num * (num + 1)
    else:
        num = (seq_num + 1) // 2
        ans += num * num
print(ans)