# use strict;
# use warnings;

my %CALENDAR_2015 = (
    1 => 0,
    2 => 2,
    3 => 0,
    4 => 1,
    5 => 0,
    6 => 1,
    7 => 0,
    8 => 0,
    9 => 1,
    10 => 0,
    11 => 1,
    12 => 0
);

my %LAST_DAY = (
    0 => 31,
    1 => 30,
    2 => 28,
    3 => 29
);

sub isHappyDay {
    my ($m, $d) = @_;
    my $x = $d < 10 ? $d : (substr($d, 0, 1) + substr($d, 1, 1));
    return $m == $x;
}

my $c = 0;
foreach (keys(%CALENDAR_2015)) {
    my $m = $_;
    my $x = $LAST_DAY{$CALENDAR_2015{$m}};
    foreach (1 .. $x) {
        my $d = $_;
        $c++ if isHappyDay($m, $d);
    }
}
print($c, "\n");