zoukankan      html  css  js  c++  java
  • 696. Count Binary Substrings

    
    

     

    
    

    Give a string s, count the number of non-empty (contiguous) substrings that have the same number of 0's and 1's, and all the 0's and all the 1's in these substrings are grouped consecutively. 

    Substrings that occur multiple times are counted the number of times they occur.

    Example 1:

    Input: "00110011"
    Output: 6
    Explanation: There are 6 substrings that have equal number of consecutive 1's and 0's: "0011", "01", "1100", "10", "0011", and "01".
    
    Notice that some of these substrings repeat and are counted the number of times they occur.
    Also, "00110011" is not a valid substring because all the 0's (and 1's) are not grouped together.

    Example 2:

    Input: "10101"
    Output: 4
    Explanation: There are 4 substrings: "10", "01", "10", "01" that have equal number of consecutive 1's and 0's.
    

    Note:

    • s.length will be between 1 and 50,000.
    • s will only consist of "0" or "1" characters.



    参考 https:
    //www.cnblogs.com/immjc/p/7678304.html ``` class Solution { public: int countBinarySubstrings(string s) { int pre = 0, cur = 1, res = 0; for (int i = 1; i != s.size(); i++) { if (s[i] == s[i - 1]) { cur++; } else { pre = cur; cur = 1; } if (pre >= cur) res++; } return res; } }; ```
    python代码
    ```
    class Solution(object):
        def countBinarySubstrings(self, s):
            """
            :type s: str
            :rtype: int
            """
            pre,cur,cnt=0,1,0
            for i in range(1,len(s)):
                if s[i]==s[i-1]:
                    cur+=1
                else:
                    pre=cur
                    cur=1
                    
                if pre>=cur:
                    cnt+=1
                    
            return cnt
            
    ```
  • 相关阅读:
    Ubuntu
    「日记」抑郁症
    [Ubuntu] 运行.AppImage格式文件
    [Database]Oracle数据库中concat和||的区别
    [Database] 不知道表名和字段查找值=1234的数据.
    [Windows]卸载Office 2016密钥
    [经验]怎么删除“通过QQ/TIM发送到”右键菜单
    Venom- Eminem
    粪便中的粪臭素稀释了以后会变成花香味
    #宽带选择# V2EX讨论
  • 原文地址:https://www.cnblogs.com/learning-c/p/9271596.html
Copyright © 2011-2022 走看看