LeetCode/java/maximum-score-after-splitting-a-string.java

class Solution {
    public int maxScore(String s) {
        // count the ones
        int ones = 0;
        for (int i = 1; i < s.length(); ++i) {
            if (s.charAt(i) == '1') {
                ++ones;
            }
        }
        int zeros = s.charAt(0) == '0' ? 1 : 0;

        int foundScore = ones + zeros;
        for (int i = 1; i < s.length() - 1; ++i) {
            switch (s.charAt(i)) {
                case '0':
                    ++zeros;
                    break;
                case '1':
                    --ones;
                    break;
            }

            foundScore = Math.max(foundScore, ones + zeros);
        }

        return foundScore;
    }
}