【leetcode】344. Reverse String

problem

344. Reverse String

 solution:

class Solution {
public:
    void reverseString(vector<char>& s) {
        vector<char> temp(s.size(), '0');
        for(int i=s.size()-1; i>=0; i--)
        {
            temp[i] = s[s.size()-i-1];
        }
        for(int i=0; i<s.size(); i++)
        {
            s[i] = temp[i];
        }
    }
};

 

 solution2:

class Solution {
public:
    void reverseString(vector<char>& s) {
        int left = 0, right = s.size()-1;
        while(left<right)
        {
            char tmp = s[left];
            s[left++] = s[right];
            s[right--] = tmp;
        }
    }
};

 

 

 

参考

1. Leetcode_344_Reverse String;

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