diff --git "a/week1/3986\354\242\213\354\235\200\353\213\250\354\226\264/solution.py" "b/week1/3986\354\242\213\354\235\200\353\213\250\354\226\264/solution.py"
index e69de29..00084c4 100644
--- "a/week1/3986\354\242\213\354\235\200\353\213\250\354\226\264/solution.py"
+++ "b/week1/3986\354\242\213\354\235\200\353\213\250\354\226\264/solution.py"
@@ -0,0 +1,20 @@
+n = int(input())
+good_word = 0
+
+for _ in range(n):
+    word = input()
+    tetris = []
+
+    for alphabet in word:
+        if tetris:
+            if alphabet==tetris[-1]:
+                tetris.pop()
+            else:
+                tetris.append(alphabet)
+        else:
+            tetris.append(alphabet)
+    
+    if not tetris:
+        good_word += 1
+
+print(good_word)
\ No newline at end of file