Statement

These are hard times for the OIS… sponsors are getting scarcer every day and the balance sheet is in a huge deficit. In order to avoid bankruptcy, Edoardo is thus forced to renounce to the mega-mansion the OIS just bought for ensuring his best possible focus while preparing the tasks. The perimeter of Edoardo's mansion is a polygon with N sides of integer length, all of them either horizontal or vertical. From the cadastral map, he knows the exact position (X_i, Y_i) of each vertex P_i of the polygon. Help Edoardo compute the area of his mansion, in order to set an adequate price for it!