#include <iostream>
#include <fstream>
#include <algorithm>

using namespace std;

#define ull unsigned long long

ifstream fin("lumanari.in");
ofstream fout("lumanari.out");

const int N = 200005;

ull n, nrz, a[N], s[N];

int main()
{
    fin>>n;
    for(int i=1; i<=n; i++)
        fin>>a[i];
    sort(a+1,a+n+1);
    s[1] = a[1];
    for(int i=2; i<=n; i++)
        s[i] = (ull)(s[i-1] + a[i]);
    ull zp = 0, c = 1;
    for(int i=1; i<=n; i++)
        if(zp + c <= s[i])
            zp += (ull)c, c++, nrz++;
    fout<<nrz;
    return 0;
}