diff --git a/main.py b/main.py
index 79555c3..a188959 100644
--- a/main.py
+++ b/main.py
@@ -13,4 +13,9 @@ def print_hi(name):
 if __name__ == '__main__':
     print_hi('PyCharm')
 
+# 1번 개발자 수정
+def add_procedure (*a : int) -> int:
+    return sum(a)
+
+
 # https://www.jetbrains.com/help/pycharm/에서 PyCharm 도움말 참조