use v5.16;

my $L = <>;
my $N = <>;
my $W = <>;

chomp( $L, $N, $W );

my @W = sort { $a <=> $b } ( split / /, $W );

while ( my ( $i, $e ) = each @W ) {
    $L = $L - $e;
    if ( $L < 0 ) {
        say $i;
        exit;
    }
}
say( scalar @W ) + 1;