Both BAS and its American equivalent, the US Antarctic Program, advertise their jobs online. BAS also holds an open day in March.
There are plenty of free versions of popular VPNs, and free trials of VPNs with full access to everything you get with a premium plan. The catch is that free versions usually come with limited data usage, meaning you can't really do any streaming or downloading. Free trials come with everything you get in a paid plan, but they obviously don't last very long. Trials are great for testing out a service before committing, but this isn't a long-term solution.
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习题链接：LeetCode 901. 股票价格跨度
Genspark Plus 年度套餐 $19.99/月，提供 10000 积分。我无法查看积分消耗情况，官方也没有提供相应的消耗说明。