leetcode-007-Reverse Integer
2016-09-18 20:18
330 查看
P007 Reverse digits of an integer
思路分析
代码
java
python
Have you thought about this?
Here are some good questions to ask before coding. Bonus points for you if you have already thought through this!
If the integer’s last digit is 0, what should the output be? ie, cases such as 10, 100.
Did you notice that the reversed integer might overflow? Assume the input is a 32-bit integer, then the reverse of 1000000003 overflows. How should you handle such cases?
For the purpose of this problem, assume that your function returns 0 when the reversed integer overflows.
思路分析
代码
java
python
P007 Reverse digits of an integer.
Example1: x = 123, return 321 Example2: x = -123, return -321
Have you thought about this?
Here are some good questions to ask before coding. Bonus points for you if you have already thought through this!
If the integer’s last digit is 0, what should the output be? ie, cases such as 10, 100.
Did you notice that the reversed integer might overflow? Assume the input is a 32-bit integer, then the reverse of 1000000003 overflows. How should you handle such cases?
For the purpose of this problem, assume that your function returns 0 when the reversed integer overflows.
思路分析
没必要当做数字处理,使用字符串操作更加简单。代码
java
public class Solution007 { public int reverse(int x) { try { StringBuilder sb = new StringBuilder(new Integer(x).toString()); if (x < 0) sb.deleteCharAt(0); return x < 0 ? -Integer.parseInt(sb.reverse().toString()) : Integer.parseInt(sb.reverse().toString()); } catch (NumberFormatException e) { return 0; } } }
python
class Solution007(object): def reverse(self, x): """ :type x: int :rtype: int """ ret = "" if x < 0:ret = "-" ret += str(abs(x))[::-1] return int(ret)
相关文章推荐
- leetcode Reverse Integer 007
- 2017-09-08 LeetCode_007 Reverse Integer
- 007_LeetCode_7 Reverse Integer 题解
- LeetCode 007: Reverse Integer
- 【LeetCode-面试算法经典-Java实现】【007-Reverse Integer(翻转整数)】
- LeetCode_reverse integer_007
- 007 Reverse Integer [Leetcode]
- [leetcode]Reverse Integer
- Reverse Integer(leetcode7)
- LeetCode : Reverse Integer [java]
- leetcode 7 Reverse Integer
- Leetcode 7 Reverse Integer 将整数逆转
- leetcode: Reverse Integer
- 【LeetCode】(7)Reverse Integer(Easy)
- LeetCode Reverse Integer
- leetcode Reverse Integer
- Leetcode Problem.7—Reverse Integer
- LeetCode之Reverse Integer
- [LeetCode] Reverse Integer 翻转整数
- Reverse Integer (leetcode)