public void HashTableOpenAddressingCanHashCollisionsCorrectly()
{
var hashset = new HashTable_OpenAddressing(10);
var hash = hashset.GetHash(1);
var collisions = new List <long> {
1
};
for (var i = 2; i < 10000 && collisions.Count < 5; i++)
{
if (hashset.GetHash(i) == hash)
{
collisions.Add(i);
}
}
for (var i = 0; i < collisions.Count; i++)
{
hashset.Add(collisions[i]);
Assert.IsTrue(hashset.Contains(collisions[i]));
for (var j = i + 1; j < collisions.Count; j++)
{
Assert.IsFalse(hashset.Contains(collisions[j]), new { i, j }.ToString());
}
}
for (var i = 0; i < 100; i++)
{
Assert.AreEqual(collisions.Contains(i), hashset.Contains(i));
}
}
private void CalcNumberOfDistinctTwoSums(IEnumerable <long> nums, long min, long max)
{
var hashset = new HashTable_OpenAddressing();
var numbers = new List <long>();
foreach (var num in nums)
{
hashset.Add(num);
numbers.Add(num);
}
hashset.ShowStats();
var cnt = 0;
for (var t = min; t <= max; t++)
{
if (t % 100 == 0)
{
Console.WriteLine(t);
}
foreach (var x in numbers)
{
var y = t - x;
if (x != y && hashset.Contains(y))
{
cnt++;
break;
}
}
}
Console.WriteLine();
Console.WriteLine(cnt);
}