78 lines
2.5 KiB
Plaintext
78 lines
2.5 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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"\"\"\"Minimal example to call the GLOP solver.\"\"\"\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.linear_solver import pywraplp\n",
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"# [END import]\n",
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"\n",
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"\n",
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"# [START solver]\n",
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"# Create the linear solver with the GLOP backend.\n",
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"solver = pywraplp.Solver('simple_lp_program',\n",
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" pywraplp.Solver.GLOP_LINEAR_PROGRAMMING)\n",
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"# [END solver]\n",
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"\n",
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"# [START variables]\n",
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"# Create the variables x and y.\n",
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"x = solver.NumVar(0, 1, 'x')\n",
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"y = solver.NumVar(0, 2, 'y')\n",
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"\n",
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"print('Number of variables =', solver.NumVariables())\n",
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"# [END variables]\n",
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"\n",
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"# [START constraints]\n",
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"# Create a linear constraint, 0 <= x + y <= 2.\n",
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"ct = solver.Constraint(0, 2, 'ct')\n",
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"ct.SetCoefficient(x, 1)\n",
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"ct.SetCoefficient(y, 1)\n",
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"\n",
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"print('Number of constraints =', solver.NumConstraints())\n",
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"# [END constraints]\n",
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"\n",
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"# [START objective]\n",
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"# Create the objective function, 3 * x + y.\n",
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"objective = solver.Objective()\n",
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"objective.SetCoefficient(x, 3)\n",
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"objective.SetCoefficient(y, 1)\n",
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"objective.SetMaximization()\n",
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"# [END objective]\n",
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"\n",
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"# [START solve]\n",
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"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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"print('Solution:')\n",
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"print('Objective value =', objective.Value())\n",
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"print('x =', x.solution_value())\n",
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"print('y =', y.solution_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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