<?php

$input1 = fgets(STDIN);
$input2 = fgets(STDIN);
$input3 = fgets(STDIN);
$array = explode(" ", $input3);
asort($array);
$count = "";
$sum = 0;
foreach($array as $value) {
  	$sum += $value;
	if ($sum > $input1){
		break;
	}
	$count++;
}
echo $count;