(1). Input/output specification

Input format

The file format for the global routing contest is shown, with comments in italics (actual input files do not contain these comments). The example below gives an instance with two routing layers. The first line gives the problem size in terms of the number of horizontal and vertical tiles and the number of routing layers. Each global-routing tile (tile in short) has a capacity on each of its four boundaries to measure the available space. The default capacity value of each layer is given in the second and third lines, which represents the maximum number of routing paths allowed to pass through a tile boundary. For example, the tile boundary with capacity 10 can accommodate up to 10 routing paths. ...

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