【LeetCode】Reverse Integer

來源:互聯網
上載者:User

標籤:leetcode   倒轉整數   

      題意:

     Reverse digits of an integer.

     Example1: x = 123, return 321
     Example2: x = -123, return -321


     思路:

     把整數倒轉。很容易,只要先判斷是否負數,存起來。之後取絕對值,把絕對值倒轉後再決定是否是負數。


     代碼:

class Solution {public:    int reverse(int x) {bool neg = (x < 0);x = abs(x);int ans = 0;while(x){int t = x%10;ans = ans*10 + t;x = x/10;}if(neg) ans = -ans;return ans;    }};

     Python:

class Solution:    # @return an integer    def reverse(self, x):        flag = x < 0        x = abs(x)        x = list(str(x))        x.reverse()        x = ''.join(x)        if flag:            return int('-'+x)        else:            return int(x)



【LeetCode】Reverse Integer

聯繫我們

該頁面正文內容均來源於網絡整理,並不代表阿里雲官方的觀點,該頁面所提到的產品和服務也與阿里云無關,如果該頁面內容對您造成了困擾,歡迎寫郵件給我們,收到郵件我們將在5個工作日內處理。

如果您發現本社區中有涉嫌抄襲的內容,歡迎發送郵件至: info-contact@alibabacloud.com 進行舉報並提供相關證據,工作人員會在 5 個工作天內聯絡您,一經查實,本站將立刻刪除涉嫌侵權內容。

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.