68 lines
2.2 KiB
Plaintext
68 lines
2.2 KiB
Plaintext
{
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"cells": [
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"# Copyright 2010-2018 Google LLC\n",
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"# Licensed under the Apache License, Version 2.0 (the \"License\");\n",
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"# you may not use this file except in compliance with the License.\n",
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"# You may obtain a copy of the License at\n",
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"#\n",
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"# http://www.apache.org/licenses/LICENSE-2.0\n",
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"#\n",
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"# Unless required by applicable law or agreed to in writing, software\n",
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"# distributed under the License is distributed on an \"AS IS\" BASIS,\n",
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"# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n",
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"# See the License for the specific language governing permissions and\n",
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"# limitations under the License.\n",
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"# [START program]\n",
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"\"\"\"A simple knapsack problem.\"\"\"\n",
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"# [START import]\n",
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"from __future__ import print_function\n",
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"from ortools.algorithms import pywrapknapsack_solver\n",
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"# [END import]\n",
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"\n",
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"\n",
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"# Create the solver.\n",
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"# [START solver]\n",
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"solver = pywrapknapsack_solver.KnapsackSolver(\n",
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" pywrapknapsack_solver.KnapsackSolver.\n",
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" KNAPSACK_DYNAMIC_PROGRAMMING_SOLVER, \"test\")\n",
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"# [END solver]\n",
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"\n",
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"# [START data]\n",
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"weights = [[\n",
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" 565, 406, 194, 130, 435, 367, 230, 315, 393, 125, 670, 892, 600, 293,\n",
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" 712, 147, 421, 255\n",
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"]]\n",
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"capacities = [850]\n",
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"values = weights[0]\n",
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"# [END data]\n",
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"\n",
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"# [START solve]\n",
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"solver.Init(values, weights, capacities)\n",
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"computed_value = solver.Solve()\n",
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"# [END solve]\n",
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"\n",
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"# [START print_solution]\n",
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"packed_items = [\n",
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" x for x in range(0, len(weights[0])) if solver.BestSolutionContains(x)\n",
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"]\n",
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"packed_weights = [weights[0][i] for i in packed_items]\n",
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"\n",
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"print(\"Packed items: \", packed_items)\n",
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"print(\"Packed weights: \", packed_weights)\n",
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"print(\"Total weight (same as total value): \", computed_value)\n",
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"# [END print_solution]\n",
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"\n"
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]
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}
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],
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"metadata": {},
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"nbformat": 4,
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"nbformat_minor": 4
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}
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