LeetCode - Strings - Maximum Score After Splitting a String

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

Example 2:

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

 

class Solution {
    public int maxScore(String s) {
        int max = 0;
        for(int i=0;i<s.length()-1;i++){
            String left = s.substring(0,i+1);
            String right = s.substring(i+1,s.length());
            left = left.replaceAll("1","");
            right = right.replaceAll("0","");
            int result = left.length()+right.length();
            if(result > max) max = result;
        }
        return max;
    }
}

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