Submission #66520881

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
using i64 = long long;
using ary = array<int, 2>;
template <typename T>
using vec = vector<T>;
constexpr int N = 2e5 + 5, mod = 998244353;

int main()
{
    ios::sync_with_stdio(false), cin.tie(0);
    int n;
    cin >> n;
    map<int, int> cnt;
    for (int i = 0; i < n; ++i)
    {
        int x;
        cin >> x;
        ++cnt[x];
    }
    int mx = 0;
    for (int i = 0; i <= n; i++)
    {
        int sum = 0;
        for (auto [x, y] : cnt)
        {
            if (x >= i)
            {
                sum += y;
            }
        }
        if (sum >= i)
        {
            mx = i;
        }
    }
    cout << mx;
    return 0;
}

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