1525. Number of Good Ways to Split a String
Description
You are given a string s
.
A split is called good if you can split s
into two non-empty strings sleft
and sright
where their concatenation is equal to s
(i.e., sleft + sright = s
) and the number of distinct letters in sleft
and sright
is the same.
Return the number of good splits you can make in s
.
Example 1:
Input: s = "aacaba" Output: 2 Explanation: There are 5 ways to split "aacaba" and 2 of them are good. ("a", "acaba") Left string and right string contains 1 and 3 different letters respectively. ("aa", "caba") Left string and right string contains 1 and 3 different letters respectively. ("aac", "aba") Left string and right string contains 2 and 2 different letters respectively (good split). ("aaca", "ba") Left string and right string contains 2 and 2 different letters respectively (good split). ("aacab", "a") Left string and right string contains 3 and 1 different letters respectively.
Example 2:
Input: s = "abcd" Output: 1 Explanation: Split the string as follows ("ab", "cd").
Constraints:
1 <= s.length <= 105
s
consists of only lowercase English letters.
Solutions
Solution 1
1 2 3 4 5 6 7 8 9 10 11 12 |
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 |
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 |
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 |
|