78 lines
2.7 KiB
Plaintext
78 lines
2.7 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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"\"\"\"A simple knapsack problem.\"\"\"\n",
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"# [START program]\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_MULTIDIMENSION_BRANCH_AND_BOUND_SOLVER, 'KnapsackExample')\n",
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"# [END solver]\n",
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"\n",
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"# [START data]\n",
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"values = [\n",
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" 360, 83, 59, 130, 431, 67, 230, 52, 93, 125, 670, 892, 600, 38, 48, 147,\n",
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" 78, 256, 63, 17, 120, 164, 432, 35, 92, 110, 22, 42, 50, 323, 514, 28,\n",
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" 87, 73, 78, 15, 26, 78, 210, 36, 85, 189, 274, 43, 33, 10, 19, 389, 276,\n",
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" 312\n",
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"]\n",
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"weights = [[\n",
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" 7, 0, 30, 22, 80, 94, 11, 81, 70, 64, 59, 18, 0, 36, 3, 8, 15, 42, 9, 0,\n",
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" 42, 47, 52, 32, 26, 48, 55, 6, 29, 84, 2, 4, 18, 56, 7, 29, 93, 44, 71,\n",
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" 3, 86, 66, 31, 65, 0, 79, 20, 65, 52, 13\n",
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"]]\n",
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"capacities = [850]\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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"packed_weights = []\n",
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"total_weight = 0\n",
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"print('Total value =', computed_value)\n",
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"for i in range(len(values)):\n",
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" if solver.BestSolutionContains(i):\n",
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" packed_items.append(i)\n",
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" packed_weights.append(weights[0][i])\n",
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" total_weight += weights[0][i]\n",
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"print('Total weight:', total_weight)\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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"# [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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