PHP solutions for week 262

2 files changed, 23 insertions, 0 deletions

diff --git a/challenge-262/2colours/php/ch-1.php b/challenge-262/2colours/php/ch-1.php
new file mode 100644
index 0000000000..c714bc2363
--- /dev/null
+++ b/challenge-262/2colours/php/ch-1.php
@@ -0,0 +1,7 @@
+<?php
+
+const PARENS = ['(', ')'];
+const SQUARE_BRACKETS = ['[', ']'];
+echo '@ints = ';
+$ints = json_decode(str_replace(PARENS, SQUARE_BRACKETS, fgets(STDIN)));
+echo max(...array_map(fn ($pred) => count(array_filter($ints, $pred)), [fn ($x) => $x > 0, fn ($x) => $x < 0]));
\ No newline at end of file
diff --git a/challenge-262/2colours/php/ch-2.php b/challenge-262/2colours/php/ch-2.php
new file mode 100644
index 0000000000..bec9137694
--- /dev/null
+++ b/challenge-262/2colours/php/ch-2.php
@@ -0,0 +1,16 @@
+<?php
+
+const PARENS = ['(', ')'];
+const SQUARE_BRACKETS = ['[', ']'];
+echo '@ints = ';
+$ints = json_decode(str_replace(PARENS, SQUARE_BRACKETS, fgets(STDIN)));
+echo '$k = ';
+$k = fgets(STDIN);
+$result = 0;
+foreach ($ints as $index => $value) {
+    $needed_factor = intdiv($k, gmp_intval(gmp_gcd($index, $k)));
+    $next_valid = ceil(($index + 1) / $needed_factor) * $needed_factor;
+    $values_to_check = array_column(array_chunk(array_slice($ints, $next_valid), $needed_factor), 0);
+    $result += @array_count_values($values_to_check)[$value];
+}
+echo $result;
\ No newline at end of file