买锂矿、收金矿，左手新能源、右手贵金属，这盘横跨两大资源赛道的大棋，布局者正是常年隐匿于公众视野之外的神秘闽商——姚雄杰。
The first thing we have to do with a command-line, which we haven't done so far, is to take user input. This can be done with the following code:
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Что думаешь? Оцени!
guess = (guess + (n / guess)) / 2;