#include <bits/stdc++.h>
using namespace std;
template <typename T>
T gcd(T a, T b) {
  if (a == 0) return b;
  return gcd(b % a, a);
}
template <typename T>
T pow(T a, T b, long long m) {
  T ans = 1;
  while (b > 0) {
    if (b % 2 == 1) ans = (ans * a) % m;
    b /= 2;
    a = (a * a) % m;
  }
  return ans % m;
}
const long long N = 1e6 + 5;
const long long MOD = 1e9 + 7;
long long f[N];
int32_t main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  long long n, m;
  cin >> n >> m;
  for (long long i = 1; i <= m; i++) {
    long long k;
    cin >> k;
    f[k]++;
  }
  long long ans = m;
  for (long long i = 1; i <= n; i++) ans = min(ans, f[i]);
  cout << ans;
  return 0;
}
