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exam/utils/helpers.php

@@ -1,5 +1,11 @@
 <?php
 
+/**
+ * Constrain integer to interval `[min,max]`
+ * 
+ * @param int $min lower bound
+ * @param int $max upper bound
+ */
 function constrain(int $min, int $max, $n): int
 {
   return max(min($max, $n), $min);