<?php

$boxsize = trim(fgets(STDIN));
$blocknum = trim(fgets(STDIN));
$blocks = explode(" ",trim(fgets(STDIN)));

$res = sort($blocks, $sort_flags = SORT_NUMERIC);

$insize = 0;
for ( $inblock=0; $inblock<count($blocks); $inblock++ ) {
	if ( ($insize+$blocks[$inblock]) > $boxsize ) {
		break;
	}
	$insize += $blocks[$inblock];
}

echo $inblock ."\n";