package wangyi_qiuzhao; import java.util.Scanner; public class Main3 { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); String line = scanner.nextLine(); char[] arr = line.toCharArray(); int res = 0; for (int i = 1; i < line.length(); i++) { if (arr[i-1] == arr[i]) { reverse(arr, 0, i-1); reverse(arr, i, arr.length-1); } } int sum = 1; for (int i = 1; i < arr.length; i++) { if (arr[i-1] != arr[i]) { sum += 1; // System.out.println(sum); } else { sum = 1; } if (res < sum) { res = sum; } } System.out.println(res); } public static void reverse(char[] arr, int start, int end) { while (start < end) { char temp = arr[end]; arr[end] = arr[start]; arr[start] = temp; start++; end--; } } }