public void VerifiesPURQBinaryIndexedTree()
{
var rand = new Random();
for (int a = 0; a < _sourceArrays.Length; ++a)
{
var sourceArray = _sourceArrays[a];
var purqBinaryIndexedTree = new PURQBinaryIndexedTree(sourceArray);
for (int r = 0; r < 1000; ++r)
{
int firstIndex = rand.Next(0, sourceArray.Length);
int secondIndex = rand.Next(0, sourceArray.Length);
int mode = rand.Next(2);
if (mode == 0)
{
NaiveBinaryIndexedTreeAlternatives.PointUpdate(sourceArray, firstIndex, delta: r);
purqBinaryIndexedTree.PointUpdate(firstIndex, delta: r);
}
else
{
int startIndex = Math.Min(firstIndex, secondIndex);
int endIndex = Math.Max(firstIndex, secondIndex);
var expected = NaiveBinaryIndexedTreeAlternatives.SumQuery(sourceArray, startIndex, endIndex);
Assert.AreEqual(expected, purqBinaryIndexedTree.SumQuery(startIndex, endIndex));
}
}
}
}
private void PURQRandomOperation()
{
var purqBinaryIndexedTree = new PURQBinaryIndexedTree(_array);
for (int i = 0; i < _randomRangesCount; ++i)
{
Tuple<int, int> range = _randomRanges[i];
if (range.Item1 % 2 == 0)
{
purqBinaryIndexedTree.SumQuery(range.Item1, range.Item2);
}
else
{
for (int j = range.Item1; j <= range.Item2; ++j)
{
purqBinaryIndexedTree.PointUpdate(j, 1);
}
}
}
}
private void PURQRangeUpdate()
{
var purqBinaryIndexedTree = new PURQBinaryIndexedTree(_array);
for (int i = 0; i < _randomRangesCount; ++i)
{
Tuple<int, int> range = _randomRanges[i];
for (int j = range.Item1; j <= range.Item2; ++j)
{
purqBinaryIndexedTree.PointUpdate(j, 1);
}
}
}