73 lines
2.4 KiB
C#
73 lines
2.4 KiB
C#
// Copyright 2010-2022 Google LLC
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// [START program]
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// [START import]
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using System;
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using Google.OrTools.ConstraintSolver;
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// [END import]
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/// <summary>
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/// This is a simple CP program.
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/// </summary>
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public class SimpleCpProgram
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{
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public static void Main(String[] args)
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{
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// Instantiate the solver.
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// [START solver]
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Solver solver = new Solver("CpSimple");
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// [END solver]
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// Create the variables.
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// [START variables]
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const long numVals = 3;
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IntVar x = solver.MakeIntVar(0, numVals - 1, "x");
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IntVar y = solver.MakeIntVar(0, numVals - 1, "y");
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IntVar z = solver.MakeIntVar(0, numVals - 1, "z");
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// [END variables]
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// Constraint 0: x != y..
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// [START constraints]
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solver.Add(solver.MakeAllDifferent(new IntVar[] { x, y }));
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Console.WriteLine($"Number of constraints: {solver.Constraints()}");
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// [END constraints]
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// Solve the problem.
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// [START solve]
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DecisionBuilder db =
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solver.MakePhase(new IntVar[] { x, y, z }, Solver.CHOOSE_FIRST_UNBOUND, Solver.ASSIGN_MIN_VALUE);
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// [END solve]
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// Print solution on console.
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// [START print_solution]
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int count = 0;
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solver.NewSearch(db);
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while (solver.NextSolution())
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{
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++count;
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Console.WriteLine($"Solution: {count}\n x={x.Value()} y={y.Value()} z={z.Value()}");
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}
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solver.EndSearch();
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Console.WriteLine($"Number of solutions found: {solver.Solutions()}");
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// [END print_solution]
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// [START advanced]
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Console.WriteLine("Advanced usage:");
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Console.WriteLine($"Problem solved in {solver.WallTime()}ms");
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Console.WriteLine($"Memory usage: {Solver.MemoryUsage()}bytes");
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// [END advanced]
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}
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}
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// [END program]
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