【字符串】剑指 Offer 58 - II_左旋转字符串

【字符串】剑指 Offer 58 - II_左旋转字符串

c++(直截了当法)

class Solution {
public:
    string reverseLeftWords(string s, int n) {
        string re(s.begin()+n,s.end());
        s.erase(s.begin()+n,s.end());
        s.insert(0,re);
        return s;
    }
};

多次翻转法

class Solution {
public:
    string reverseLeftWords(string s, int n) {

        reverse(s.begin(), s.begin()+n);
        reverse(s.begin()+n, s.end());
        reverse(s.begin(), s.end());
        return s;
    }
};