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


a = sorted([(val, idx) for idx, val in enumerate(a)])
ans = 0
win = 0
for i in range(n - 1):
    win += a[i][1] + 1
    lose = a[i + 1][1] + 1
    ans = max(win - lose, ans)

print(ans)