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March 28, 2022 21:43
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from ortools.algorithms import pywrapknapsack_solver | |
def main(): | |
solver = pywrapknapsack_solver.KnapsackSolver( | |
pywrapknapsack_solver.KnapsackSolver. | |
KNAPSACK_MULTIDIMENSION_BRANCH_AND_BOUND_SOLVER, 'KnapsackExample') | |
values = [ | |
360, 83, 59, 130, 431, 67, 230, 52, 93, 125, 670, 892, 600, 38, 48, 147, | |
78, 256, 63, 17, 120, 164, 432, 35, 92, 110, 22, 42, 50, 323, 514, 28, | |
87, 73, 78, 15, 26, 78, 210, 36, 85, 189, 274, 43, 33, 10, 19, 389, 276, | |
312 | |
] | |
weights = [[ | |
7, 0, 30, 22, 80, 94, 11, 81, 70, 64, 59, 18, 0, 36, 3, 8, 15, 42, 9, 0, | |
42, 47, 52, 32, 26, 48, 55, 6, 29, 84, 2, 4, 18, 56, 7, 29, 93, 44, 71, | |
3, 86, 66, 31, 65, 0, 79, 20, 65, 52, 13 | |
]] | |
capacities = [850] | |
solver.Init(values, weights, capacities) | |
computed_value = solver.Solve() | |
packed_items = [] | |
packed_weights = [] | |
total_weight = 0 | |
print('Total value =', computed_value) | |
for i in range(len(values)): | |
if solver.BestSolutionContains(i): | |
packed_items.append(i) | |
packed_weights.append(weights[0][i]) | |
total_weight += weights[0][i] | |
print('Total weight:', total_weight) | |
print('Packed items:', packed_items) | |
print('Packed_weights:', packed_weights) | |
if __name__ == '__main__': | |
main() |
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