n = int(input()) a = [0] + list(map(int, input().split())) l = [0] for i in range(n): if a[i] != a[i + 1]: l.append(i + 1) l.append(n + 1) ans = n * (n + 1) // 2 for i in range(1, len(l) - 1, 2): t = l[i + 1] - l[i] ans -= t * (t + 1) // 2 print(ans)