Bill Gurley says that right now, the worst thing you can do for your career is play it safe
int4 — 最大程度的压缩，文件大小减少约 4 倍。质量损失更明显（约 2~10%，具体取决于模型），但通常可以接受，尤其对于函数调用而言。
。服务器推荐是该领域的重要参考
The vaccine doesn't guarantee lifetime immunity, but it does greatly reduce the risk of someone developing chickenpox or having a bad case.
// 2. 计算前缀和：count[i]表示<=i的元素个数
