#include <bits/stdc++.h>
#define ld long double
#define ll long long
#define sz size()
#define all(xx) xx.begin(),xx.end()
#define pb push_back
#define in insert
#define er erase
#define S second
#define F first
#define pii pair <int, int>
#define to_be continue
#define mp make_pair
#define stop exit (0)
#define fname ""
#define speed ios_base::sync_with_stdio(0);cin.tie(0)
#define input freopen (fname".in", "r", stdin)
#define output freopen (fname".out", "w", stdout)
//#define int ll
#define N 600000
using namespace std;
const int inf = 1e9 + 123;
const ll INF = 1e18 + 123;
const double pi = acos (-1.0);
const ld eps = 1e-3;
int n, a[N], ans;
int main ()
{
speed;
cin >> n;
for (int i = 1; i <= n; i ++)
cin >> a[i];
sort (a + 1, a + 1 + n);
if (n <= a[i])
ans = n, stop;
for (int i = 1; i <= n; i ++)
{
if (a[i] != a[i + 1])
{
if (a[i] < n - i && a[i + 1] >= n - i)
ans = n - i;
}
}
cout << ans;
}
//Coded by A....
Compilation message
hindeks.cpp: In function 'int main()':
hindeks.cpp:39:15: error: 'i' was not declared in this scope
if (n <= a[i])
^
