Update README.md

holmir97 · web-flow · commit de41e253d663 · 2021-04-11T23:51:42.000+09:00
diff --git a/README.md b/README.md
@@ -17,6 +17,8 @@
 |NUMBER|TITLE|CODE|DIFFICULTY|
 |---|---|---|---|
 |#1149|RGB 거리|[code](https://github.com/holmir97/Algorithm/commit/917b3eb3185b04f8bad659ba5f37e1dc95c1e845)|Silver1|
+|#2564|경비원|[code](https://github.com/holmir97/Algorithm/commit/aca2134bdf347fc1eedb05a5bd51359d044c924f)|Silver1|
+
 
 
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