// 本地测试示例：head = [2,1,5] → 输出 [5,5,0]
Before diving into API design, it's worth asking: what is a stream?
，这一点在搜狗输入法2026中也有详细论述
When those councils are factored in, more than a third of councils will still not be collecting food waste from all homes by March.
Медведев вышел в финал турнира в Дубае17:59