1221. Split a String in Balanced Strings

Balanced strings are those who have equal quantity of 'L' and 'R' characters.

Given a balanced string s split it in the maximum amount of balanced strings.

Return the maximum amount of splitted balanced strings.

Example 1:

Input: s = "RLRRLLRLRL"
Output: 4
Explanation: s can be split into "RL", "RRLL", "RL", "RL", each substring contains same number of 'L' and 'R'.

Example 2:

Input: s = "RLLLLRRRLR"
Output: 3
Explanation: s can be split into "RL", "LLLRRR", "LR", each substring contains same number of 'L' and 'R'.

Example 3:

Input: s = "LLLLRRRR"
Output: 1
Explanation: s can be split into "LLLLRRRR".

Example 4:

Input: s = "RLRRRLLRLL"
Output: 2
Explanation: s can be split into "RL", "RRRLLRLL", since each substring contains an equal number of 'L' and 'R'

class Solution {
    public int balancedStringSplit(String s) {
        int cnt = 0;
        int res = 0;
        
        for(int i = 0; i < s.length(); i++){
            cnt += s.charAt(i) == 'L' ? 1 : -1;
            res += cnt == 0 ? 1 : 0;
        }
        return res;
    }
}

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来源： https://www.cnblogs.com/wentiliangkaihua/p/12345189.html