public void DecideRoles()
 {
     // Manager Role
     Manager      = Agents.First(a => a.CleanedCells.Count == Agents.Max(p => p.CleanedCells.Count));
     Manager.Role = ContractRole.Manager;
     // Contract Roles
     Contractors = new List <MasCleaningAgent>(Agents.Where(a => a.Id != Manager.Id));
     foreach (var cleaningAgent in Contractors)
     {
         cleaningAgent.Role = ContractRole.Contractor;
     }
     (Contractors as List <MasCleaningAgent>).Add(Manager);
 }