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#! /usr/bin/env perl
use strict;
use bigrat; # -> inf
use feature 'signatures';
use Perl6::Junction 'all';
use List::Util qw/sum max/;
use Getopt::Long;
use feature 'say';
no warnings qw(experimental::signatures);
my $verbose = 0;
GetOptions("verbose" => \$verbose);
my @N = @ARGV;
die "Please specify at least one element" unless @N;
die "Integers only" unless all(@N) == qr/^\d+$/;
push(@N, inf); unshift(@N, inf);
my %M = map { $_ => $N[$_] } 0 .. (@N -1);
my @C = (); ## x (length(@N));
my $N_end = @N -2;
for my $index (sort { $M{$a} <=> $M{$b} } keys %M)
{
$C[$index] = candy_count($index);
say ": Index $index with value $M{$index} and candies $C[$index]" if $verbose;
}
if ($verbose)
{
say ": Ranking w/border: " . join(", ", @N);
say ": Candies w/border: " . join(", ", @C);
say ": Ranking: " . join(", ", @N[1..$N_end]);
say ": Candies: " . join(", ", @C[1..$N_end]);
}
say sum(@C);
sub candy_count ($index)
{
return 0 if $index == 0 || $index == @N -1;
return max($C[$index-1], $C[$index+1]) +1 if $N[$index] > $N[$index-1] || $N[$index] > $N[$index+1];
return 1;
}
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