diff --git a/.DS_Store b/.DS_Store
new file mode 100644
index 0000000..befd501
Binary files /dev/null and b/.DS_Store differ
diff --git "a/programmers/\354\225\275\354\210\230\354\235\230 \355\225\251.py" "b/programmers/\354\225\275\354\210\230\354\235\230 \355\225\251.py"
new file mode 100644
index 0000000..fc9b0ba
--- /dev/null
+++ "b/programmers/\354\225\275\354\210\230\354\235\230 \355\225\251.py"	
@@ -0,0 +1,11 @@
+def solution(n):
+    answer = 0
+    리스트 = []
+    
+    for i in range(1, n+1):
+        if n % i == 0:
+            리스트.append(i)
+            
+    for i in range(len(리스트)):
+        answer += 리스트[i]
+    return answer
\ No newline at end of file
diff --git "a/programmers/\354\247\235\354\247\200\354\226\264 \354\240\234\352\261\260\355\225\230\352\270\260.py" "b/programmers/\354\247\235\354\247\200\354\226\264 \354\240\234\352\261\260\355\225\230\352\270\260.py"
new file mode 100644
index 0000000..e845974
--- /dev/null
+++ "b/programmers/\354\247\235\354\247\200\354\226\264 \354\240\234\352\261\260\355\225\230\352\270\260.py"	
@@ -0,0 +1,12 @@
+def solution(s):
+    리스트 = []
+    
+    for i in s:
+        if len(리스트) == 0:
+            리스트.append(i)
+        elif i == 리스트[-1]:
+            리스트.pop()
+        else:
+            리스트.append(i)
+        
+    return int(리스트 == [])
\ No newline at end of file
diff --git "a/programmers/\355\217\211\352\267\240 \352\265\254\355\225\230\352\270\260.py" "b/programmers/\355\217\211\352\267\240 \352\265\254\355\225\230\352\270\260.py"
new file mode 100644
index 0000000..2ef80d9
--- /dev/null
+++ "b/programmers/\355\217\211\352\267\240 \352\265\254\355\225\230\352\270\260.py"	
@@ -0,0 +1,8 @@
+def solution(arr):
+    answer = 0
+    cnt = 0
+    for i in range(len(arr)):
+        cnt += arr[i]
+    answer = cnt / len(arr)
+    
+    return answer
\ No newline at end of file