From 83b5a09e738577c4daf2347a0cbcfd74721590da Mon Sep 17 00:00:00 2001
From: Hubert Van De Walle <hubv@protonmail.com>
Date: Fri, 18 Dec 2020 13:11:20 +0100
Subject: [PATCH] Don't actually need recursion

---
 days/src/main/kotlin/Day18.kt | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/days/src/main/kotlin/Day18.kt b/days/src/main/kotlin/Day18.kt
index 338e0e6..6befef1 100644
--- a/days/src/main/kotlin/Day18.kt
+++ b/days/src/main/kotlin/Day18.kt
@@ -43,7 +43,7 @@ class Day18(@Lines val input: Input<List<String>>) {
 
     private fun solveGroup(group: String, precedence: Boolean) = solveGroup(parseGroup(group), precedence)
 
-    private tailrec fun solveGroup(group: Pair<LinkedList<Long>, LinkedList<Operator>>, precedence: Boolean): Long {
+    private fun solveGroup(group: Pair<LinkedList<Long>, LinkedList<Operator>>, precedence: Boolean): Long {
         val (operands, operators) = group
         println(operands)
         println(operators)
@@ -79,7 +79,7 @@ class Day18(@Lines val input: Input<List<String>>) {
                 i++
             }
 
-            return solveGroup(operands to operators, precedence = false)
+            return operands.reduce { a, b -> Operator.Multiply(a, b) }
         }
     }