g0501_0600.s0541_reverse_string_ii

Class Solution

java.lang.Object

g0501_0600.s0541_reverse_string_ii.Solution

public class Solution
extends Object

541 - Reverse String II.

Easy

Given a string s and an integer k, reverse the first k characters for every 2k characters counting from the start of the string.

If there are fewer than k characters left, reverse all of them. If there are less than 2k but greater than or equal to k characters, then reverse the first k characters and left the other as original.

Example 1:

Input: s = “abcdefg”, k = 2

Output: “bacdfeg”

Example 2:

Input: s = “abcd”, k = 2

Output: “bacd”

Constraints:

• 1 <= s.length <= 104
• s consists of only lowercase English letters.
• 1 <= k <= 104

Constructor Summary

Constructors

Constructor and Description
Solution()

Method Summary

Modifier and Type	Method and Description
String	reverseStr(String s, int k)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Solution

public Solution()

Method Detail

reverseStr

public String reverseStr(String s,
                         int k)