Thirty instances of the two-dimensional non-guillotine cutting problem

These are 30 instances of the two-dimensional non-guillotine cutting problem, which aims at maximizing the total value of rectangular pieces cut from a larger rectangle. These instances were introduced in: Amaral, A. R. S. (2000) A new mixed-integer programming model and solution approach for the two-dimensional non-guillotine cutting problem. Technical report, Federal University of Espırito Santo (UFES), Brazil. Notation: The large stock rectangle has length L and width W. Each piece i has length l_i, width w_i and value v_i, i= 1, . . . , m. Q_i is the maximum number of copies of piece i that can be cut. M=∑Q_i is the maximum number of pieces which can be cut. The format of the file is as follows: ----------- m L W l_1 w_1 Q_1 v_1 . . l_i w_i Q_i v_i . . l_m w_m Q_m v_m ----------- The optimal solution value for each instance is provided.