use strict;
use warnings;

my $verbose = 0;

my ($h, $a) = split /[ \n]/, <>;

my @enemy = ($h);
my $count = 0;

print $#enemy, "\n" if ($verbose);

while ($#enemy >= 0) {
    if ($verbose) {
        print "enemy : ";
        for (@enemy) {
            print "$_, ";
        }
        print "\n";
    }
    my $x = pop @enemy;
    my $y = int($x / $a);
    print "y = $y\n" if ($verbose);
    $count++;
    print "count = $count\n" if ($verbose);

    if ($y > 0) {
        push @enemy, $y;
        $count++;
    }
}

print "count = " if ($verbose);
print $count, "\n";