Update 504.base-7.md

andy814 · web-flow · commit 7c17b82d1fbd · 2022-01-21T00:25:35.000-05:00
diff --git a/problems/504.base-7.md b/problems/504.base-7.md
@@ -85,7 +85,7 @@ class Solution:
 class Solution:
     def convertToBase7(self, num: int) -> str:
         if num == 0:
-            return 0
+            return "0"
         ans = []
         is_negative = num < 0
         num = abs(num)
