def RunLengthEncoding(S):
    res = []
    N = len(S)
    i = 0
    while i < N:
        cnt = 1
        while i < N - 1 and S[i] == S[i + 1]:
            cnt += 1
            i += 1
        res.append((S[i], cnt))
        i += 1
    return res


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

ans = N*(N+1)//2
for k, v in RunLengthEncoding(A):
    if k == 1:
        ans -= v * (v + 1) // 2
print(ans)