diff --git a/13/1.pl b/13/1.pl
new file mode 100644
index 0000000..a58cd98
--- /dev/null
+++ b/13/1.pl
@@ -0,0 +1,16 @@
+use 5.20.0;
+
+use List::AllUtils qw/ /;
+use experimental qw/ signatures postderef /;
+
+my %g = map { split ': ' }  <>;
+
+my $score;
+
+for my $g ( keys %g ) {
+    next if $g  % (2*($g{$g}-1));
+    warn $g;
+    $score += $g  * $g{$g};
+}
+
+say $score;
diff --git a/13/2.pl b/13/2.pl
new file mode 100644
index 0000000..9e2c3fb
--- /dev/null
+++ b/13/2.pl
@@ -0,0 +1,23 @@
+use 5.20.0;
+
+use List::AllUtils qw/ /;
+use experimental qw/ signatures postderef /;
+
+my %g = map { split ': ' }  <>;
+
+
+my $i = 1;
+
+until( pass($i) ) {
+    $i++;
+}
+
+say '>>>',$i;
+    
+sub pass($i) {
+    for my $g ( keys %g ) {
+        return unless ($i+$g)  % (2*($g{$g}-1));
+    }
+    return 1;
+}
+
diff --git a/13/input.txt b/13/input.txt
new file mode 100644
index 0000000..5055e90
--- /dev/null
+++ b/13/input.txt
@@ -0,0 +1,43 @@
+0: 4
+1: 2
+2: 3
+4: 5
+6: 8
+8: 4
+10: 6
+12: 6
+14: 6
+16: 10
+18: 6
+20: 12
+22: 8
+24: 9
+26: 8
+28: 8
+30: 8
+32: 12
+34: 12
+36: 12
+38: 8
+40: 10
+42: 14
+44: 12
+46: 14
+48: 12
+50: 12
+52: 12
+54: 14
+56: 14
+58: 14
+60: 12
+62: 14
+64: 14
+68: 12
+70: 14
+74: 14
+76: 14
+78: 14
+80: 17
+82: 28
+84: 18
+86: 14
diff --git a/13/test b/13/test
new file mode 100644
index 0000000..0239024
--- /dev/null
+++ b/13/test
@@ -0,0 +1,4 @@
+0: 3
+1: 2
+4: 4
+6: 4