Add 2018 and 2017

1 files changed, 78 insertions, 0 deletions

diff --git a/2017/lib/AdventOfCode.pm6 b/2017/lib/AdventOfCode.pm6
new file mode 100644
index 0000000..eef09d0
--- /dev/null
+++ b/2017/lib/AdventOfCode.pm6
@@ -0,0 +1,78 @@
+use v6;
+
+sub do-captcha(@input, $cmp-offset) returns Int {
+    my @tmp = @input.rotate($cmp-offset);
+    (@input Z @tmp).map(-> $z {
+        if $z[0] == $z[1] { $z[0] } else { 0 }
+    }).reduce(&[+])
+}
+
+sub day01(Str $input) returns Int is export {
+    do-captcha($input.comb, 1)
+}
+
+sub day01b(Str $input) returns Int is export {
+    do-captcha($input.comb, $input.comb.elems/2)
+}
+
+sub checksum(@input) returns Int is export {
+    [+] @input.map(-> @i {
+        @i.max - @i.min
+    })
+}
+
+sub find-divisible(@row) returns Int {
+    for @row -> $x {
+        for @row -> $y {
+            if $x %% $y and $x != $y {
+                return ($x/$y).Int
+            }
+        }
+    }
+}
+
+sub evenly-divisible-values(@input) returns Int is export {
+    [+] @input.map(-> @i {
+        find-divisible(@i)
+    })
+}
+
+# Day 3
+
+sub position(Int $num) {
+    my Int $num-square = (^Inf).map(*²).grep(* ≥ $num)[0];
+    my Int $square-size = $num-square.sqrt.Int;
+    my $max-step = ($square-size/2).floor;
+    my @retval = $max-step, $max-step;
+    say "$num, $num-square, $square-size, $max-step, {@retval}";
+    if $num-square == $num { return @retval; }
+    
+    while $num-square > $num {
+        say "$num-square > ($square-size - 1)";
+        $num-square -= ($square-size -1);
+    }
+
+    $num-square > $num or die(" Error !! $num-square > $num");
+
+    if $num-square == $num { return @retval; }
+
+    for ^($square-size*4 -1) -> $i {
+        $num-square -= 1;
+        say "Step 2-$i: $num-square == $num ? {@retval[0]}";
+        if $num-square != $num {
+            @retval[0] = (@retval[0]-1) % ($max-step + 1);
+        }
+    }
+    say "Returning: {@retval}";
+    return @retval;
+}
+
+sub manhattan-distance(@position) returns Int {
+    say "Sum {@position.perl}";
+    [+] @position
+}
+
+sub spiral-memory(Int $input) returns Int is export {
+    say "position: {position($input).perl}";
+    manhattan-distance(position($input))
+}