面试题 58 - II. 左旋转字符串

输入: s = "abcdefg", k = 2
输出: "cdefgab"

输入: s = "lrloseumgh", k = 6
输出: "umghlrlose"

class Solution:
    def reverseLeftWords(self, s: str, n: int) -> str:
        return s[n:] + s[:n]

class Solution {
    public String reverseLeftWords(String s, int n) {
        return s.substring(n, s.length()) + s.substring(0, n);
    }
}

/**
 * @param {string} s
 * @param {number} n
 * @return {string}
 */
var reverseLeftWords = function (s, n) {
  return s.substring(n) + s.substr(0, n);
};