LeetCode-面试题58-2-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 {
    public String reverseLeftWords(String s, int n) {
        if(s==null||s.length()<=0) return "";
        StringBuilder res = new StringBuilder();
        if(s!=null){
            for(int i=n;i<s.length();i++){
                res.append(s.charAt(i));
            }
            for(int j=0;j<n;j++){
                res.append(s.charAt(j));
            }
        }
        return res.toString();
    }
}

class Solution:
    def reverseLeftWords(self, s: str, n: int) -> str:
        if not s: return ""
        if s:
            return s[n:]+s[:n]