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转载自:点击打开链接 描述 一根长度为1米的木棒上有若干只蚂蚁在爬动。它们的速度为每秒一厘米或静止不动,方向只有两种,向左或者向右。如果两只蚂蚁碰头,则它们立即交换速度并继续爬动。三只蚂蚁碰头,则两边的蚂蚁交换速度,中间的蚂蚁仍然静止。如果它们爬到了木棒的边缘... 阅读全文
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Description The country is facing a terrible civil war----cities in the country are divided into two parts supporting different ... 阅读全文
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Description Freddy Frog is sitting on a stone in the middle of a lake. Suddenly he notices Fiona Frog who is sitting on another ... 阅读全文