From 9ba5ad695e71217c33422124759fd83bc6af06d9 Mon Sep 17 00:00:00 2001
From: onyx <code@onyxandiris.online>
Date: Tue, 2 Jan 2024 06:58:03 +0000
Subject: [PATCH] add mutex lock

---
 day-5/two.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/day-5/two.go b/day-5/two.go
index 1fc2ed6..aae550e 100644
--- a/day-5/two.go
+++ b/day-5/two.go
@@ -6,6 +6,7 @@ import (
 )
 
 var wg sync.WaitGroup
+var mu sync.Mutex
 
 const UNLIMITED = -1
 
@@ -68,7 +69,9 @@ func two(lines []string) int {
 		wg.Add(1)
 		go func(i int) {
 			defer wg.Done()
+			mu.Lock()
 			seedRanges = append(seedRanges, nextTransform(0, []bound{newBound(seeds[i], seeds[i]+seeds[i+1]-1)})...)
+			mu.Unlock()
 		}(i)
 	}