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package yukicoder001_100;

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;

/**
 *
 * @author yuya
 */
public class No005 {

    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String line1 = br.readLine();
        String line2 = br.readLine();
        String line3 = br.readLine();
        int L = Integer.parseInt(line1);
        int N = Integer.parseInt(line2);
        
        String [] s = line3.split(" ",0);
        int n[] = new int[N];
        
        for(int i=0;i<s.length;i++){
            n[i]=Integer.parseInt(s[i]);
        }
        Arrays.sort(n);
        int ans=0;
        int b =0;
        for(int i=0;i<=n.length-1;i++){
            b+=n[i];
            if(b<=L){
                
                ans++;
            }else{
                break;
            }
        }
        System.out.println(ans);
    }
}