// Copyright 2010-2018 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.

using System;
using Google.OrTools.Sat;

public class OptionalIntervalSampleSat
{
  static void Main()
  {
    CpModel model = new CpModel();
    int horizon = 100;
    IntVar start_var = model.NewIntVar(0, horizon, "start");
    // C# code supports IntVar or integer constants in intervals.
    int duration = 10;
    IntVar end_var = model.NewIntVar(0, horizon, "end");
    IntVar presence_var = model.NewBoolVar("presence");
    IntervalVar interval = model.NewOptionalIntervalVar(
        start_var, duration, end_var, presence_var, "interval");
  }
}