今早的G电面，郁闷坏了... - 未名空间(mitbbs.com)


今早的G电面，郁闷坏了... - 未名空间(mitbbs.com)

Suppose we are given S rectangles on 2 dimensional space:
1) each one is specified x1, y1, x2, y2 
2) calculate the area covered by these S rectangles.

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