Package g0501_0600.s0541_reverse_string_ii

Class Solution

java.lang.Object
g0501_0600.s0541_reverse_string_ii.Solution
public class Solution extends java.lang.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
    Description
    Solution()
     

  • Method Summary

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

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • reverseStr

      public java.lang.String reverseStr(java.lang.String s, int k)