static void Main(string[] args)
{
var inputArgs = Console.ReadLine().Split().Select(int.Parse).ToArray();
int soldierCount = inputArgs[0];
int shelterCount = inputArgs[1];
int capacity = inputArgs[2];
var soldiers = new Soldier[soldierCount];
for (int i = 0; i < soldierCount; i++)
{
inputArgs = Console.ReadLine().Split().Select(int.Parse).ToArray();
var soldier = new Soldier(inputArgs[0], inputArgs[1]);
soldiers[i] = soldier;
}
var shelters = new Shelter[shelterCount];
for (int i = 0; i < shelterCount; i++)
{
inputArgs = Console.ReadLine().Split().Select(int.Parse).ToArray();
var shelter = new Shelter(inputArgs[0], inputArgs[1], capacity);
shelters[i] = shelter;
}
var points = new List <IPoint>();
points.AddRange(soldiers);
points.AddRange(shelters);
points = points.OrderBy(x => x.X).ToList();
var stackSoldiers = new Stack <Soldier>();
var stackShelters = new Stack <Shelter>();
double maxDistance = 0;
foreach (var point in points)
{
if (point.GetType().Name == "Soldier")
{
stackSoldiers.Push((Soldier)point);
}
else
{
stackShelters.Push((Shelter)point);
}
while (stackSoldiers.Count > 0 && stackShelters.Count > 0)
{
var shelter = stackShelters.Pop();
while (shelter.Capcity > 0 && stackSoldiers.Count > 0)
{
var soldier = stackSoldiers.Pop();
var distance = soldier.DistanceToShelter(shelter);
if (distance > maxDistance)
{
maxDistance = distance;
}
shelter.Capcity--;
}
if (shelter.Capcity > 0)
{
stackShelters.Push(shelter);
}
}
}
Console.WriteLine($"{maxDistance:f6}");
}