/*Starting with the name of almighty ALLAH*/
/*Solved by 'Nazmul'*/
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using vi = vector<int>;
using vll = vector<ll>;
using vpii = vector<pii>;
using vpll = vector<pll>;
#define endl '\n'
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define sz(x) (int)(x).size()
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define lb lower_bound
#define ub upper_bound
#define FAST_IO              \
    ios::sync_with_stdio(0); \
    cin.tie(0);              \
    cout.tie(0);
const int INF = 1e9;
const ll LINF = 1e18;
const int MOD = 1e9 + 7;
const int MAXN = 2e5 + 5;

ll gcd(ll a, ll b) { return b == 0 ? a : gcd(b, a % b); }
ll lcm(ll a, ll b) { return (a * b) / gcd(a, b); }
bool com(int a, int b) { return a > b ? true : false; }
ll power(ll base, ll exp)
{
    ll res = 1;
    base %= MOD;
    while (exp > 0)
    {
        if (exp % 2 == 1)
            res = (res * base) % MOD;
        base = (base * base) % MOD;
        exp /= 2;
    }
    return res;
}

void solve()
{
    int n;
    cin >> n;
    vector<int> a(n);
    for (auto &x : a)
        cin >> x;

    int ans = 0;
    for (int i = 0; i < n; ++i)
    {
        bool is_special = false;
        int rge = 0;
        for (int j = i + 1; j < n; ++j)
        {
            if (a[j] >= a[i])
            {
                rge++;
            }
            if (rge >= a[i])
            {
                is_special = true;
                break;
            }
        }
        if (!is_special)
        {
            int lse = 0;
            for (int j = 0; j < i; ++j)
            {
                if (a[j] <= a[i])
                {
                    lse++;
                }
                if (lse >= a[i])
                {
                    is_special = true;
                    break;
                }
            }
        }

        if (is_special)
        {
            ans++;
        }
    }
    cout << ans << endl;
}
int main()
{
    FAST_IO
    int t = 1;
    // cin >> t;
    while (t--)
        solve();
    return 0;
}