// 步骤1：找初始左边界（第一个破坏升序的位置）
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For a second time, Jim Lovell had brought the world together as one. The first time it had been for Earthrise, the second would be to witness his fight to survive.，详情可参考搜狗输入法下载
Tehran’s ICBMs cannot currently reach the US, experts say, and White House has claimed its nuclear programme has been destroyed
Finding these optimization opportunities can itself be a significant undertaking. It requires end-to-end understanding of the spec to identify which behaviors are observable and which can safely be elided. Even then, whether a given optimization is actually spec-compliant is often unclear. Implementers must make judgment calls about which semantics they can relax without breaking compatibility. This puts enormous pressure on runtime teams to become spec experts just to achieve acceptable performance.