#include<iostream>
#include<string>
#include<utility>
using namespace std;

int main(){
  int l,n,sw=1;
  cin >> l >> n;
  int w[n];
  for(int i=0;i<n;i++)
    cin >> w[i];
  while(sw){
    sw=0;
    for(int i=0;i<n-1;i+=2){
      if(w[i]>w[i+1]){
        swap(w[i],w[i+1]);
        sw=1;
      }
    }
    for(int i=1;i<n-1;i+=2){
      if(w[i]>w[i+1]){
        swap(w[i],w[i+1]);
        sw=1;
      }
    }
  }
  int i,sum=0,count=0;
  for(i=0;sum<=l;i++){
    sum+=w[i];
    count++;
  }
  cout << count-1 << "\n";
  return 0;
}