void heap_sort(int * arr, int length, int asce) {
int i;
for (i = length/2; i >= 0; i--)
min_heap(arr, i, length);
int min;
for (i = length-1; i >= 1; i--) {
min = arr[0];
arr[0] = arr[i];
arr[i] = min;
min_heap(arr, 0, i);
}
}
void delete_min()
{
min_heap();
a[1]=a[hsize];
hsize--;
perc_down(1);
}
int main()
{
int limit = std::numeric_limits<int>::min();
Min_heap<int> min_heap(27, limit);
min_heap.insert(13);
min_heap.insert(21);
min_heap.insert(16);
min_heap.insert(24);
min_heap.insert(31);
min_heap.insert(19);
min_heap.insert(68);
min_heap.insert(65);
min_heap.insert(26);
min_heap.insert(32);
min_heap.print(std::cout);
std::cout<<"insert \"14\"\n";
min_heap.insert(14);
min_heap.print(std::cout);
std::cout<<"erase minimal element\n";
min_heap.erase_min();
min_heap.print(std::cout);
std::cout<<"decrease_key(5,20) : \n";
min_heap.decrease_key(5,20);
min_heap.print(std::cout);
std::cout<<"increase_key(1,20) : \n";
min_heap.increase_key(1,20);
min_heap.print(std::cout);
return 0;
}
int main(int argc, char *argv[])
{
Heap min_heap(argv[1]); // heap.cpp
Node* huffman_code_tree = min_heap.BuildHuffmanCodeTree(); // heap.cpp
HuffmanCodeTreeTraversals(huffman_code_tree); // tree_traversal.cpp
CodeTable code_table(huffman_code_tree); // code_table.cpp
code_table.Encode(argv[1]); // code_table.cpp
}
int pop()
{
int min = heap[1];
heap[1] = heap[heap[0]];
pos[heap[1]] = 1;
heap[0]--;
min_heap(1);
return min;
}
int findKthLargest(vector<int>& nums, int k) {
MinHeap min_heap (k);
for (int i = 0; i < nums.size(); ++i) {
if (nums[i] > min_heap.getFirstValue()) {
min_heap.replace(nums[i]);
}
// min_heap.print();
}
return min_heap.getFirstValue();
}
void min_heap(int i)
{
int min;
int tmp;
int r = RIGHT(i);
int l = LEFT(i);
if(l <= heap[0] && d[heap[l]] < d[heap[i]]) min = l;
else min = i;
if(r <= heap[0] && d[heap[r]] < d[heap[min]]) min = r;
if(min != i)
{
tmp = heap[i]; heap[i] = heap[min]; heap[min] = tmp;
min_heap(min);
pos[heap[i]] = i;
pos[heap[min]] = min;
}
}
int FindMedian(std::vector<int> &vec) {
std::vector<int> min_heap(1, INT_MAX), max_heap(1, INT_MIN);
for (int i = 0; i < vec.size(); i++) {
if (vec[i] < max_heap[0]) {
if (max_heap.size() > min_heap.size()) {
int root = PopHeapRoot(max_heap, true);
InsertHeap(min_heap, root, false);
}
InsertHeap(max_heap, vec[i], true);
} else if (vec[i] > min_heap[0]) {
if (min_heap.size() >= max_heap.size()) {
int root = PopHeapRoot(min_heap, false);
InsertHeap(max_heap, root, true);
}
InsertHeap(min_heap, vec[i], false);
} else {
if (min_heap.size() >= max_heap.size())
InsertHeap(max_heap, vec[i], true);
else
InsertHeap(min_heap, vec[i], false);
}
}
return max_heap[0];
}
std::unordered_map<int, std::unordered_map<int, int>> base_balance_algo_for_all(
std::unordered_map<int, int>& num_objs) {
int average = (int) std::accumulate(
num_objs.begin(), num_objs.end(), 0.0,
[&](double a, std::pair<int, int> pair) -> double { return a + (double) pair.second / num_objs.size(); });
auto greater = [](const std::pair<int, int>& left, const std::pair<int, int>& right) {
return left.second < right.second;
};
auto less = [](const std::pair<int, int>& left, const std::pair<int, int>& right) {
return left.second > right.second;
};
std::priority_queue<std::pair<int, int>, std::vector<std::pair<int, int>>, decltype(greater)> max_heap(greater);
std::priority_queue<std::pair<int, int>, std::vector<std::pair<int, int>>, decltype(less)> min_heap(less);
// the minimum number of objects a thread should have
int at_least = average;
// the maximum number of objects a thread should have
int at_most = average + 1;
for (auto& v : num_objs) {
if (v.second > at_least) {
max_heap.push(v);
}
if (v.second < at_most) {
min_heap.push(v);
}
}
// the migration plan
// key: source global_tid
// value: destination global_tid and number of objects transfered
std::unordered_map<int, std::unordered_map<int, int>> res;
while (!min_heap.empty() && !max_heap.empty()) {
std::pair<int, int> min_pair = min_heap.top();
min_heap.pop();
const int dst_tid = min_pair.first;
const int min_obj_num = min_pair.second;
int already_moved = 0;
while (!max_heap.empty() && min_obj_num + already_moved < at_least) {
int num_to_be_moved = 0;
std::pair<int, int> max_pair = max_heap.top();
max_heap.pop();
const int src_tid = max_pair.first;
const int max_obj_num = max_pair.second;
const int at_most_can_move = max_obj_num - at_least;
const int need = at_least - (min_obj_num + already_moved);
// check whether this thread has enough objects to be moved
// if not
if (need >= at_most_can_move) {
already_moved += at_most_can_move;
num_to_be_moved = at_most_can_move;
} else {
already_moved += need;
num_to_be_moved = need;
// if it still has excess objects can be moved
// push back to the heap
if ((max_obj_num - num_to_be_moved) >= at_most) {
max_heap.push(std::make_pair(src_tid, max_obj_num - num_to_be_moved));
}
}
assert(num_to_be_moved >= 0);
if (res.find(src_tid) == res.end()) {
res[src_tid] = std::unordered_map<int, int>();
}
res[src_tid][dst_tid] = num_to_be_moved;
}
}
return res;
}
