add 1415 prod variant

Ashwagandha-coder · Ashwagandha-coder · commit 07447ef1eece · 2025-02-19T14:07:50.000+05:00
diff --git a/contest/src/main/java/com/github/contest/backtracking/BacktrackingProdVariant.kt b/contest/src/main/java/com/github/contest/backtracking/BacktrackingProdVariant.kt
@@ -26,6 +26,7 @@ private fun isPunishment(num: Int): Boolean {
 
 /**
  * 1415. The k-th Lexicographical String of All Happy Strings of Length n
+ * Prod Variant
  */
 
 
