#include<iostream>
#include<vector>
using namespace std;

int main() {
    int n, m;
    cin >> n >> m;
    vector<int>counts(n,0);
   
    int score = m;
    for (int i = 0; i < m; i++) {
        int number=0;
        cin >> number;
        counts[number-1]++;
    }

    for (int i = 0; i < n; i++) {
        if (score > counts[i]) {
            score = counts[i];
        }
    }
    cout << score << endl;
    return 0;
}