// 核心逻辑：维护单调递增栈，仅当k0时移除高位大数
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The approaches differ in where they draw the boundary. Namespaces use the same kernel but restrict visibility. Seccomp uses the same kernel but restricts the allowed syscall set. Projects like gVisor use a completely separate user-space kernel and make minimal host syscalls. MicroVMs provide a dedicated guest kernel and a hardware-enforced boundary. Finally, WebAssembly provides no kernel access at all, relying instead on explicit capability imports. Each step is a qualitatively different boundary, not just a stronger version of the same thing.
南方周末：决赛第三天结束时，现场一直等到欧洲时间次日凌晨两点多才公布结果。那五个多小时的等待过程中，你都在做些什么？