diff --git a/resource/runner/problem/book/ch1/3. acc_sum/data/output/4.output b/resource/runner/problem/book/ch1/3. acc_sum/data/output/4.output
index 1c288bb..a2c73af 100644
--- a/resource/runner/problem/book/ch1/3. acc_sum/data/output/4.output	
+++ b/resource/runner/problem/book/ch1/3. acc_sum/data/output/4.output	
@@ -1 +1 @@
-61382716
+395061382716