4f381f6d07
* bump abseil to 20250814 * bump protobuf to v32.0 * cmake: add ccache auto support * backport flatzinc, math_opt and sat update
71 lines
2.7 KiB
C#
71 lines
2.7 KiB
C#
// Copyright 2010-2025 Google LLC
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// [START program]
|
|
using System;
|
|
using Google.OrTools.Sat;
|
|
|
|
public class NoOverlapSampleSat
|
|
{
|
|
static void Main()
|
|
{
|
|
CpModel model = new CpModel();
|
|
// Three weeks.
|
|
int horizon = 21;
|
|
|
|
// Task 0, duration 2.
|
|
IntVar start_0 = model.NewIntVar(0, horizon, "start_0");
|
|
int duration_0 = 2;
|
|
IntVar end_0 = model.NewIntVar(0, horizon, "end_0");
|
|
IntervalVar task_0 = model.NewIntervalVar(start_0, duration_0, end_0, "task_0");
|
|
|
|
// Task 1, duration 4.
|
|
IntVar start_1 = model.NewIntVar(0, horizon, "start_1");
|
|
int duration_1 = 4;
|
|
IntVar end_1 = model.NewIntVar(0, horizon, "end_1");
|
|
IntervalVar task_1 = model.NewIntervalVar(start_1, duration_1, end_1, "task_1");
|
|
|
|
// Task 2, duration 3.
|
|
IntVar start_2 = model.NewIntVar(0, horizon, "start_2");
|
|
int duration_2 = 3;
|
|
IntVar end_2 = model.NewIntVar(0, horizon, "end_2");
|
|
IntervalVar task_2 = model.NewIntervalVar(start_2, duration_2, end_2, "task_2");
|
|
|
|
// Weekends.
|
|
IntervalVar weekend_0 = model.NewIntervalVar(5, 2, 7, "weekend_0");
|
|
IntervalVar weekend_1 = model.NewIntervalVar(12, 2, 14, "weekend_1");
|
|
IntervalVar weekend_2 = model.NewIntervalVar(19, 2, 21, "weekend_2");
|
|
|
|
// No Overlap constraint.
|
|
model.AddNoOverlap(new IntervalVar[] { task_0, task_1, task_2, weekend_0, weekend_1, weekend_2 });
|
|
|
|
// Makespan objective.
|
|
IntVar obj = model.NewIntVar(0, horizon, "makespan");
|
|
model.AddMaxEquality(obj, new IntVar[] { end_0, end_1, end_2 });
|
|
model.Minimize(obj);
|
|
|
|
// Creates a solver and solves the model.
|
|
CpSolver solver = new CpSolver();
|
|
CpSolverStatus status = solver.Solve(model);
|
|
|
|
if (status == CpSolverStatus.Optimal)
|
|
{
|
|
Console.WriteLine("Optimal Schedule Length: " + solver.ObjectiveValue);
|
|
Console.WriteLine("Task 0 starts at " + solver.Value(start_0));
|
|
Console.WriteLine("Task 1 starts at " + solver.Value(start_1));
|
|
Console.WriteLine("Task 2 starts at " + solver.Value(start_2));
|
|
}
|
|
}
|
|
}
|
|
// [END program]
|