/* -*- coding: utf-8 -*-
 *
 * 1687.cc:  No.1687 What the Heck? - yukicoder
 */

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<cmath>
#include<iostream>
#include<string>
#include<vector>
#include<map>
#include<set>
#include<stack>
#include<list>
#include<queue>
#include<deque>
#include<algorithm>
#include<numeric>
#include<utility>
#include<complex>
#include<functional>
 
using namespace std;

/* constant */

const int MAX_N = 200000;

/* typedef */

typedef long long ll;

/* global variables */

int qs[MAX_N];

/* subroutines */

/* main */

int main() {
  int n;
  scanf("%d", &n);

  for (int i = 0; i < n; i++) {
    int pi;
    scanf("%d", &pi), pi--;
    qs[pi] = i + 1;
  }

  ll sum = (ll)n * (n + 1) / 2 - qs[n - 1] * 2;
  ll maxsum = sum;

  for (int i = n - 1; i >= 0; i--) {
    sum += qs[i];
    if (i > 0) sum -= qs[i - 1] * 2;
    maxsum = max(maxsum, sum);
  }

  printf("%lld\n", maxsum);
  return 0;
}