#include<iostream>
#include<vector>
#include<algorithm>
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]++;
    }
    cout << *min_element(counts.begin(),counts.end()) << endl;
    return 0;
}