Aurora lights shimmering over Earth were filmed on camera by Russia's space agency Roscosmos cosmonaut Sergey Kud-Sverchkov from the International Space Station. The phenomenon is caused by solar storms emitting high-speed charged particles colliding with gases in Earth’s atmosphere. The most common colour seen during this display is green, although other colours such as pink and red are sometimes visible as well.
Artificial intelligence
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OsmAnd identifies the clusters containing your start and target points.
// 栈空 → 无更大元素，返回-1；栈非空 → 取栈顶（第一个更大值）