您知道吗,斯德哥尔摩是一座建在 14 个岛屿上的城市,有 57 座桥梁连接着梅拉伦湖和波罗的海。




  • 同一方向上的桥梁不能超过两座;
  • 桥梁只能是垂直或水平的,不能跨越岛屿或其他桥梁;
  • 完成后,地图上的所有岛屿都由桥梁相互连接,可以从任何一个岛屿通往另一个岛屿。

您的函数必须返回一个按升序排序的带有桥梁的方向元组。每个方向都是一个包含三个整数的元组。前两个整数是岛屿的序号(升序排序),第三个整数是这两个岛屿之间的桥梁数(1 或 2)。岛屿必须从 1 开始排序,从左上到右下,行-主。


输入整数元组 (int).

输出:由三个整数组成的元组 (int).


assert archipelago(
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