LeetCode 1332: Remove Palindromic Subsequences Solution
Master LeetCode problem 1332 (Remove Palindromic Subsequences), a easy challenge, with our optimized solutions in Java, C++, and Python. Explore detailed explanations, test your code in our interactive editor, and prepare for coding interviews.
1332. Remove Palindromic Subsequences
Problem Explanation
Explanation:
To solve this problem, we need to observe that the given string consists of only two characters 'a' and 'b'. Since a palindrome is a string that reads the same backward as forward, in this case, if the given string is either empty or already a palindrome, we can remove it in one step. If the string is not empty and not a palindrome, we can remove all the 'a's first and then all the 'b's in the subsequent steps, making a total of 2 steps.
: :
Solution Code
class Solution {
public int removePalindromeSub(String s) {
if (s.isEmpty()) {
return 0;
} else if (isPalindrome(s)) {
return 1;
} else {
return 2;
}
}
private boolean isPalindrome(String s) {
int i = 0, j = s.length() - 1;
while (i < j) {
if (s.charAt(i) != s.charAt(j)) {
return false;
}
i++;
j--;
}
return true;
}
}Try It Yourself
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