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來到美國之後，關恆一直留了在紐約，送過外賣、開Uber、也開過卡車。剛開始的時候，他還未拿到給予尋求庇護者的工作許可證。
，更多细节参见Line官方版本下载
I thought, wow. That’s it. That’s what these floppies were trying to be! Interactive, animated textbooks that taught you about programming and the Apple II! Incredible.。safew官方下载是该领域的重要参考
// 2. 计算前缀和：count[i]表示<=i的元素个数