LeetCode 344

Reverse String

문제 출처

문제

Write a function that reverses a string. The input string is given as an array of characters char[].

Do not allocate extra space for another array, you must do this by modifying the input array in-place with O(1) extra memory.

You may assume all the characters consist of printable ascii characters.



Example 1:

Input: ["h","e","l","l","o"]
Output: ["o","l","l","e","h"]
Example 2:

Input: ["H","a","n","n","a","h"]
Output: ["h","a","n","n","a","H"]

나의 코드

/**
 Do not return anything, modify s in-place instead.
 */
function reverseString(s: string[]): void {
  // s.reverse();

  let left: number = 0;
  let right: number = s.length - 1;
  let temp: string;

  while (left < right) {
    temp = s[left];
    s[left] = s[right];
    s[right] = temp;

    left++;
    right--;
  }
}

참고 코드

배운점