#include <bits/stdc++.h>
using namespace std;
const int N = 105;
int freq[N];
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m;
  cin >> n >> m;
  for (int i = 0; i < m; i++) {
    int type;
    cin >> type;
    freq[type]++;
  }
  int start = 1, end = 100;
  while (start <= end) {
    int mid = (start + end) >> 1;
    int persons = 0;
    for (int types = 1; types <= 100; types++) {
      persons += (freq[types] / mid);
    }
    if (persons >= n)
      start = mid + 1;
    else
      end = mid - 1;
  }
  cout << end << "\n";
  return 0;
}
