/**
* initialize your data structure here.
*/
public MedianFinder()
{
_leftOfMedianHeap = BinaryHeap <int> .CreateMaxHeap();
_rightOfMedianHeap = BinaryHeap <int> .CreateMinHeap();
}
private int LeastInterval1(char[] tasks, int n)
{
// SS: runtime complexity: O(t * n log t )
// space complexity: O(t)
var maxHeap1 = BinaryHeap <int> .CreateMaxHeap();
var maxHeap2 = BinaryHeap <int> .CreateMaxHeap();
// SS: task buckets
int[] taskBuckets = new int[26];
for (int i = 0; i < tasks.Length; i++)
{
var task = tasks[i];
int taskIdx = task - 'A';
taskBuckets[taskIdx]++;
}
for (int i = 0; i < 26; i++)
{
var nTasks = taskBuckets[i];
if (nTasks > 0)
{
maxHeap1.Push(nTasks);
}
}
int totalTimeUnits = 0;
while (maxHeap1.IsEmpty == false)
{
// SS: number of tasks
int s1 = maxHeap1.Pop();
if (s1 > 1)
{
maxHeap2.Push(s1 - 1);
}
int timeUnits = 1;
int distance = n;
while (distance > 0 && maxHeap1.Length + maxHeap2.Length > 0)
{
if (maxHeap1.IsEmpty == false)
{
// SS: get next task that is not in conflict
int s2 = maxHeap1.Pop();
if (s2 > 1)
{
maxHeap2.Push(s2 - 1);
}
}
timeUnits++;
distance--;
}
totalTimeUnits += timeUnits;
while (maxHeap2.IsEmpty == false)
{
int t = maxHeap2.Pop();
maxHeap1.Push(t);
}
}
return(totalTimeUnits);
}
