#include<iostream>
#include<vector>
#include<algorithm>
#define rep(i,n) for(i=0; i<n; i++)
using namespace std;

int main()
{
    int n,m;
    cin >> n >> m;
    vector<int> v;
    int candy, i;
    rep(i,n) {
        cin >> candy;
        v.push_back(candy);
    }
    sort(v.begin(),v.end());
    int cnt1=0, cnt2=0;
    rep(i,m) {
        if(v[cnt1]>0) {
            v[cnt1]--;
            if(v[cnt1]==0) {
                cnt1++;
                cnt2++;
            }
        }
    }
    cout << cnt2 << endl;
    return 0;
}