describe

Given a string s of zeros and ones, return the maximum score after splitting the string into two non-empty substrings (i.e. left substring and right substring).

The score after splitting a string is the number of zeros in the left substring plus the number of ones in the right substring.

Example 1:

Input: s = "011101"
Output: 5 
Explanation: 
All possible ways of splitting s into two non-empty substrings are:
left = "0" and right = "11101", score = 1 + 4 = 5 
left = "01" and right = "1101", score = 1 + 3 = 4 
left = "011" and right = "101", score = 1 + 2 = 3 
left = "0111" and right = "01", score = 1 + 1 = 2 
left = "01110" and right = "1", score = 2 + 1 = 3	
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Example 2:

Input: s = "00111"
Output: 5
Explanation: When left = "00" and right = "111", we get the maximum score = 2 + 3 = 5
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Example 3:

Input: s = "1111"
Output: 3
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Note:

2 <= s.length <= 500
The string s consists of characters '0' and '1' only.
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parsing

The number of 0s on the left and the number of 1s on the right of s divided into two parts. If the character is 0, zeros will be added by one; otherwise, ones + zeros will be subtracted by one. Then score will be compared with ones + zeros. The score at the end of the loop is the answer.

answer

class Solution(object):
    def maxScore(self, s):
        """
        :type s: str
        :rtype: int
        """
        score = 0        
        zeros = 0
        ones = s.count('1') 
        
        for i in range(len(s)-1):
            if s[i] == '0':
                zeros += 1
            else:
                ones -= 1
            score = max(score, ones + zeros)
            
        return score            	      
		
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The results

Runtime: 10 ms, faster than 94.77% of Python online submissions for Maximum Score After Splitting a String. Memory Usage: Submissions in Python online submissions for Maximum Score After Splitting a String.Copy the code

Original link: leetcode.com/problems/ma…

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