题目：
题解：
class Solution {public int compress(char[] chars) {int n = chars.length;int write = 0, left = 0;for (int read = 0; read < n; read++) {if (read == n - 1 || chars[read] != chars[read + 1]) {chars[write++] = chars[read];int num = read - left + 1;if (num > 1) {int anchor = write;while (num > 0) {chars[write++] = (char) (num % 10 + '0');num /= 10;}reverse(chars, anchor, write - 1);}left = read + 1;}}return write;}public void reverse(char[] chars, int left, int right) {while (left < right) {char temp = chars[left];chars[left] = chars[right];chars[right] = temp;left++;right--;}}
}
