diff --git a/124 3진법.py b/124 3진법.py
new file mode 100644
index 0000000..5efc6e5
--- /dev/null
+++ b/124 3진법.py	
@@ -0,0 +1,18 @@
+b=int(input('hah'))
+f=0
+h=''
+while  b>0:
+    f = b%3
+    b= b//3
+    if f==0:
+        f=4
+        b=b-1
+    h=str(f)+h
+print(h)
+
+
+
+
+# if b==3
+#	b=4
+