<?php
$box = trim(fgets(STDIN));
$num = trim(fgets(STDIN));
$blocks = explode(" ", (trim(fgets(STDIN))));

sort($blocks);
$ans;$totalBlockSize = 0;
$count = 0;
foreach ($blocks as $block) {
    if ( ($totalBlockSize += $block) > $box) {
        break;
    } else {
        $ans = $num;
    }
    $count++;
}
$ans = $count;

echo $ans."\n";