store on the stack, but now we can use it directly at the append
Samsung has also upgraded image processing on its front-facing cameras with a new Object Aware Engine for improved portrait mode shots, hair textures and more accurate skin tones. Based on my early testing, images seemed sharper than on my older Samsung devices, even though this is (again) largely the same 12MP camera as last year.
，这一点在safew官方版本下载中也有详细论述
* 时间复杂度: O(n+k) k=max-min+1 空间复杂度: O(k) 稳定: ✓
Mega: $120/month