Merge remote-tracking branch 'upstream/master'

1 files changed, 21 insertions, 0 deletions

diff --git a/challenge-270/2colours/php/ch-1.php b/challenge-270/2colours/php/ch-1.php
new file mode 100644
index 0000000000..a648391f0a
--- /dev/null
+++ b/challenge-270/2colours/php/ch-1.php
@@ -0,0 +1,21 @@
+<?php
+
+$matrix = json_decode(file_get_contents('php://stdin'));
+$solutions = $matrix;
+
+foreach ($matrix as $row => $content) {
+        $valid_row = array_sum($content) === 1;
+        foreach ($solutions[$row] as &$value) {
+                $value *= $valid_row;
+        }
+}
+foreach (array_map(null, ...$matrix) as $column => $content) {
+        $valid_column = array_sum($content) === 1;
+        foreach (array_keys($solutions) as $row) {
+                $solutions[$row][$column] *= $valid_column;
+        }
+}
+
+$result = 0;
+array_walk_recursive($solutions, function ($elem) use (&$result) { $result += $elem; });
+echo $result;
\ No newline at end of file