#!/usr/bin/perl -l

use strict;
use warnings;
use File::Find;

@ARGV=grep {-d or !warn "`$_': not a directory!\n"} @ARGV;
die "Usage: $0 <dir> [<dirs>]\n" unless @ARGV;

my ($tot,$maxsz,$max,$n)=(0,0);

find { no_chdir => 1,
       wanted => sub {
           return unless -f;
           $n++;
           $tot += my $sz=-s;
           ($max,$maxsz)=($_,$sz) if $sz >= $maxsz;
       } }, @ARGV;

die "Found 0 files\n" unless $n;

print <<"EOF";
Total files found: $n
Total size: $tot
Largest file: `$max' (size: $maxsz bytes)
EOF

__END__