#include <bits/stdc++.h>

using namespace std;

int main() {
    int n, m;
    cin >> n >> m;
    
    vector<int> c(n);
    for (auto &i: c) {
        cin >> i;
    }
    
    int ans = 0;
    for (int i = 0; i < m; ++i) {
        int &minValue = *min_element(c.begin(), c.end());
        minValue -= 1;
        if (minValue == 0) {
            ans += 1;
            minValue = numeric_limits<int>::max();
        }
        
    }
    
    cout << ans << endl;
}