class BIT:
    def __init__(self, n):
        self.n = n
        self.bit = [0]*(self.n+1) # 1-indexed

    def init(self, init_val):
        for i, v in enumerate(init_val):
            self.add(i, v)

    def add(self, i, x):
        # i: 0-indexed
        i += 1 # to 1-indexed
        while i <= self.n:
            self.bit[i] += x
            i += (i & -i)

    def sum(self, i, j):
        # return sum of [i, j)
        # i, j: 0-indexed
        return self._sum(j) - self._sum(i)

    def _sum(self, i):
        # return sum of [0, i)
        # i: 0-indexed
        res = 0
        while i > 0:
            res += self.bit[i]
            i -= i & (-i)
        return res

    def lower_bound(self, x):
        s = 0
        pos = 0
        depth = self.n.bit_length()
        v = 1 << depth
        for i in range(depth, -1, -1):
            k = pos + v
            if k <= self.n and s + self.bit[k] < x:
                    s += self.bit[k]
                    pos += v
            v >>= 1
        return pos

    def __str__(self): # for debug
        arr = [self.sum(i,i+1) for i in range(self.n)]
        return str(arr)

n = int(input())
P = list(map(int, input().split()))
bit = BIT(n+5)
for i in range(1, n+1):
    bit.add(i, 1)
ans = 0
for i in reversed(range(n)):
    p = P[i]
    s = bit.sum(p+1, bit.n)
    if s == 0:
        if bit.sum(p, p+1) > 0:
            bit.add(p, -1)
        else:
            j = bit.lower_bound(1)
            if j != p:
                ans -= (i+1)
            bit.add(j, -1)
    else:
        ng = p+1
        ok = bit.n
        while ng+1 < ok:
            c = (ng+ok)//2
            if bit.sum(p+1, c) > 0:
                ok = c
            else:
                ng = c
        ans += i+1
        bit.add(ok-1, -1)
temp = 0
for i, p in enumerate(P):
    if p != n:
        temp += (i+1)
    else:
        temp -= i+1
print(max(ans, temp))