use strict;

my $total = 0;
my $count = 0;
my %occur = ();
my @list;

if(defined(@ARGV) && $ARGV[0] eq "-f") { # fast mode, averages only
  shift(@ARGV);
  while(<>) {
    next unless(/^\s*[\d\.]+\s*$/);
    $total+=$_;
    $count++;
  }
  if($count) { printf "    Avg: %.3f\n", $total/$count; } 
  exit;
}

while(<>) {
  next unless(/^\s*[\d\.]+\s*$/);
  chomp($_);
  $occur{$_}++;
  push(@list, $_);
  $total+=$_;
}

unless(defined(@list)) { exit; }
$count = $#list +1;

my $mode = (sort {$occur{$b} <=> $occur{$a}} (keys %occur))[0];
my $mode_count = $occur{$mode};

my ($min,$median,$max) = (sort {$a <=> $b} @list)[0,int($count/2),-1];

printf "Entries: %d\n", $count;
printf "    Max: %.3f\n", $max;
printf "    Min: %.3f\n", $min;
printf "  Total: %.3f\n", $total;
printf "    Avg: %.3f\n", $total/$count;
printf " Median: %.3f\n", $median;
printf "   Mode: %.3f (%d occurances)\n", $mode, $mode_count;