Split a String in Balanced Strings

Author: anantkaushik

1221-split-a-string-in-balanced-strings.py

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+"""
+Problem Link: https://leetcode.com/problems/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' 
+
+Constraints:
+1 <= s.length <= 1000
+s[i] = 'L' or 'R'
+"""
+class Solution:
+    def balancedStringSplit(self, s: str) -> int:
+        count = res = 0
+        for c in s:
+          count += 1 if c == 'L' else -1
+          res += count == 0
+        return res