1221.split_a_string_in_balanced_strings.js

// 1221. Split a String in Balanced Strings
// Easy

// 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'

var balancedStringSplit = function(s) {
    let sub_count = 0;
    let count = 0;
    for (let char of s) {
        if (char === 'R') count += 1;
        if (char === 'L') count -= 1;
        if (count === 0) sub_count += 1;
    }
    return sub_count;
};