N = int(input())
A = [0]+list(map(int,input().split()))
cnt = 1
def f(n):
    return (n*(n-1))//2
ans = f(N)+1
for i in range(2,N+1):
    if A[i]==A[i-1]:
        cnt += 1
    else:
        ans -= f(cnt)
        cnt = 1
ans -= f(cnt)
print(ans)