题解 | 单组_字符串
单组_字符串
https://www.nowcoder.com/practice/e3a57b2ff6de4aefb82af98925df544e
import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int n = scanner.nextInt(); scanner.nextLine(); // 消耗换行符 String s = scanner.nextLine(); char[] chars = s.toCharArray(); int left = 0, right = n - 1; while (left < right) { char temp = chars[left]; chars[left] = chars[right]; chars[right] = temp; left++; right--; } System.out.println(new String(chars)); } }