my $stairs = <STDIN>;

my @stairs = split(/ /, $stairs);

my $high = $stairs[0] / $stairs[1];

if($high< int($high)){
   my $high_r = int($high) - 1;
   $high_r = $high_r + 1;
   print "$high_r\n";
}else{
    $high = $high + 1;
    print int($high)."\n";
}