Created
October 23, 2017 05:36
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fanny's knapsack problem
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from ortools.algorithms import pywrapknapsack_solver | |
def main(): | |
# Create the solver. | |
solver = pywrapknapsack_solver.KnapsackSolver( | |
pywrapknapsack_solver.KnapsackSolver. | |
KNAPSACK_MULTIDIMENSION_BRANCH_AND_BOUND_SOLVER, | |
'test') | |
values = [ 6361805,3746995,3760474,2911334,2237414,2298067,2106000,1964477,1886976,1550016,1843171,2015021,1809475,1607299,1603930,1172621,1745453,1533168,1479254,1644365,1600560,1334362,1290557,1344470,1213056,1266970,579571,1159142,970445,1098490,990662,815443,798595,6739,6739,454896 ] | |
weights = [[ 5912461,3345563,3145558,2398118,1690942,1539240,1410375,1315803,1263892,1253316,1194566,1186492,1028033,974392,966090,948161,917689,858290,846392,842972,841510,701554,698056,666170,659016,657174,517479,479020,387245,348384,297690,153346,28049,5449,5093,-165113 ]] | |
capacities = [6600000] | |
solver.Init(values, weights, capacities) | |
computed_value = solver.Solve() | |
packed_items = [x for x in range(0, len(weights[0])) | |
if solver.BestSolutionContains(x)] | |
packed_weights = [weights[0][i] for i in packed_items] | |
total_weight= sum(packed_weights) | |
print "Packed items: ", packed_items | |
print "Packed weights: ", packed_weights | |
print "Total value: ", computed_value | |
print "Total weight: ", total_weight | |
if __name__ == '__main__': | |
main() |
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