import sys
input = sys.stdin.readline
from collections import *

N = int(input())
P = list(map(int, input().split()))
Pi = [(P[i], i+1) for i in range(N)]
Pi.sort(reverse=True)
ans = 0
now = N*(N+1)//2

for _, i in Pi:
    now -= 2*i
    ans = max(ans, now)
    now += i

print(ans)