[Solved] Balanced strings are those that have an equal quantity of ‘L’ and ‘R’ characters. Given a balanced string s, split it into some number of substrings such that: Each substring is balanced.

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Question

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

Given a balanced string s, split it into some number of substrings such that:

  • Each substring is balanced.

Return the maximum number of balanced strings you can obtain.

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 = "RLRRRLLRLL"
Output: 2
Explanation: s can be split into "RL", "RRRLLRLL", each substring contains same number of 'L' and 'R'.
Note that s cannot be split into "RL", "RR", "RL", "LR", "LL", because the 2nd and 5th substrings are not balanced.

Example 3:

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

Constraints:

  • 2 <= s.length <= 1000
  • s[i] is either 'L' or 'R'.
  • s is a balanced string.

Python Solution

class Solution:
    def balancedStringSplit(self, s: str) -> int:
        nr=0
        nl=0
        c=0
        cs=''
        for i in range(len(s)):
            if s[i]=='L':
                nl+=1
            else:
                nr+=1
            cs+=s[i]
            if nl==nr:
                c+=1
                cs=''
        return c

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