//No.5 数字のブロック
 import java.util.*;
 import java.io.*;
 import static java.util.Arrays.*;
 import static java.lang.Math.*;
 
 public class No5 {
 
     static final InputStream in = System.in;
     static final PrintWriter out = new PrintWriter(System.out,false);
 
     static void solve(){
         int l = nextInt();
         int n = nextInt();
         int[] w = nextArrayInt(n);
         sort(w);
         int sum = 0;
         int cnt = 0;
         for (int i=0; i<n; i++) {
             if (sum + w[i] <= l) {
                 cnt++;
                 sum += w[i];
             }else {
                break;
             }
         }
         out.println(cnt);
     }
 
     public static void main(String[] args) throws Exception {
         long start = System.currentTimeMillis();
 
         solve();
         out.flush();
 
         long end = System.currentTimeMillis();
         //trace(end-start + "ms");
         in.close();
     }
 
     static void trace(Object... o) { System.out.println(deepToString(o));}
 
     static final byte[] buf = new byte[1024];
     static int ptr = 0;
     static int buflen = 0;
 
     static boolean hasNextByte() {
         if (ptr < buflen)
             return true;
         ptr = 0;
         try{
             buflen = in.read(buf);
         }catch (IOException e) {e.printStackTrace();}
         if (buflen <= 0)
             return false;
         return true;
     }
 
     static int readByte() { if (hasNextByte()) return buf[ptr++]; else return -1;}
 
     static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
 
     static void skip() { while(hasNextByte() && !isPrintableChar(buf[ptr])) ptr++;}
 
     static boolean hasNext() {skip(); return hasNextByte();}
 
     static String next() {
         if (!hasNext()) throw new NoSuchElementException();
         StringBuilder sb = new StringBuilder();
         int b = readByte();
         while (isPrintableChar(b)) {
             sb.appendCodePoint(b);
             b = readByte();
         }
         return sb.toString();
     }
 
     static long nextLong() {
         if (!hasNext()) throw new NoSuchElementException();
         boolean minus = false;
         long num = readByte();
 
         if(num == '-'){
             num = 0;
             minus = true;
         }else if (num < '0' || '9' < num){
             throw new NumberFormatException();
         }else{
             num -= '0';
         }
         
         while(true){
             int b = readByte();
             if('0' <= b && b <= '9')
                 num = num * 10 + (b - '0');
             else if(b == -1 || !isPrintableChar(b))
                 return minus ? -num : num;
             else
                 throw new NoSuchElementException();
         }
     }
 
     static int nextInt() {
         long num = nextLong();
         if (num < Integer.MIN_VALUE || Integer.MAX_VALUE < num)
             throw new NumberFormatException();
         return (int)num;
     }
 
     static double nextDouble() {
         return Double.parseDouble(next());
     }
 
     static char nextChar() {
         if (!hasNext()) throw new NoSuchElementException();
         return (char)readByte();
     }
 
     static String nextLine() {
         while (hasNextByte() && (buf[ptr] == '\n' || buf[ptr] == '\r')) ptr++;
         if (!hasNextByte()) throw new NoSuchElementException();
 
         StringBuilder sb = new StringBuilder();
         int b = readByte();
         while (b != '\n' && b != '\r') {
             sb.appendCodePoint(b);
             b = readByte();
         }
 
         return sb.toString();
     }
 
     static int[] nextArrayInt(int n) {
         int[] a = new int[n];
         for (int i=0; i<n; i++) a[i] = nextInt();
         return a;
     }
 }