diff --git "a/leetcode3/\354\265\234\354\233\220\354\244\200/3827. Count Monobit Integers.py" "b/leetcode3/\354\265\234\354\233\220\354\244\200/3827. Count Monobit Integers.py"
new file mode 100644
index 00000000..97c60762
--- /dev/null
+++ "b/leetcode3/\354\265\234\354\233\220\354\244\200/3827. Count Monobit Integers.py"	
@@ -0,0 +1,17 @@
+class Solution:
+    def countMonobit(self, n: int) -> int:
+        def is_monobit(num):
+            binary = bin(num)[2:]
+            base = binary[0]
+            for b in binary:
+                if b != base:
+                    return False
+            return True
+
+        ans = 0
+        for i in range(n+1):
+            ans += is_monobit(i)
+        return ans
+
+        
+