🌵541. Reverse String II
https://leetcode.com/problems/reverse-string-ii/
js
/**
* @param {string} s
* @param {number} k
* @return {string}
*/
var reverseStr = function(s, k) {
let result = ''
let i = 0
while (i < s.length) {
result += s.slice(i, i + k).split('').reverse().join('')
result += s.slice(i + k, i + 2 * k)
i += 2 * k
}
return result
}py
class Solution:
def reverseStr(self, s, k):
"""
:type s: str
:type k: int
:rtype: str
"""
result = ''
i = 0
while i < len(s):
result += s[i:i + k][::-1]
result += s[i + k:i + 2 * k]
i += 2 * k
return result