[9] 回文数

.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

src/leecode/python/9.回文数.py

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+#
+# @lc app=leetcode.cn id=9 lang=python3
+#
+# [9] 回文数
+#
+
+# @lc code=start
+
+# 偶数位 123321
+# 12332 1233  123
+# 1     12    123
+
+# 奇数位 121
+# 12 1
+# 1  12
+class Solution:
+    def isPalindrome(self, x: int) -> bool:
+       if x < 0 or (x % 10 == 0 and x != 0):
+           return False
+       res = 0
+       while res < x:
+           res = res * 10 + x % 10
+           x //= 10
+       return res == x or res // 10 == x
+# @lc code=end
+