2024-06-02 Daily Challenge
Today I have done leetcode's June LeetCoding Challenge with cpp
.
June LeetCoding Challenge 2
Description
Reverse String
Write a function that reverses a string. The input string is given as an array of characters s
.
You must do this by modifying the input array in-place with O(1)
extra memory.
Example 1:
Input: s = ["h","e","l","l","o"] Output: ["o","l","l","e","h"]
Example 2:
Input: s = ["H","a","n","n","a","h"] Output: ["h","a","n","n","a","H"]
Constraints:
1 <= s.length <= 105
s[i]
is a printable ascii character.
Solution
auto speedup = [](){
cin.tie(nullptr);
cout.tie(nullptr);
ios::sync_with_stdio(false);
return 0;
}();
class Solution {
public:
void reverseString(vector<char>& s) {
int len = s.size();
for(int i = 0; i * 2 < len; ++i) {
swap(s[i], s[len - 1 - i]);
}
}
};