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// @Title: 旋转字符串 (Rotate String)
// @Author: 15816537946@163.com
// @Date: 2022-04-07 21:05:35
// @Runtime: 0 ms
// @Memory: 1.8 MB
func rotateString(s, goal string) bool {
    return len(s) == len(goal) && strings.Contains(s+s, goal)
}