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author | Santo Cariotti <santo@dcariotti.me> | 2021-02-06 19:56:36 +0100 |
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committer | Santo Cariotti <santo@dcariotti.me> | 2021-02-06 19:56:36 +0100 |
commit | d2edbc38cac8da52f58c5cd3da6c0c625fa05736 (patch) | |
tree | a51e9a4e56fc9d4c7c9e37576dceedca3a0c72b4 /2_anno/Algoritmi/data_structures/heap.rs | |
parent | 98f34040820dc3a964b7be59a698323e8cc6c8a3 (diff) |
conf: rename
Diffstat (limited to '2_anno/Algoritmi/data_structures/heap.rs')
-rw-r--r-- | 2_anno/Algoritmi/data_structures/heap.rs | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/2_anno/Algoritmi/data_structures/heap.rs b/2_anno/Algoritmi/data_structures/heap.rs deleted file mode 100644 index 9dde55c..0000000 --- a/2_anno/Algoritmi/data_structures/heap.rs +++ /dev/null @@ -1,115 +0,0 @@ -struct Heap<T> { - array: [T; 32], - is_minheap: bool, - size: usize, -} - -impl<T> Heap<T> -where - T: PartialOrd + Copy + Default, -{ - fn new() -> Self { - Heap { - array: [T::default(); 32], - is_minheap: false, - size: 0, - } - } - - fn insert(&mut self, k: T) { - self.size += 1; - self.array[self.size] = k; - let mut i = self.size; - - while i > 1 && self.compare(i >> 1, i) { - let temp = self.array[i]; - self.array[i] = self.array[i >> 1]; - self.array[i >> 1] = temp; - i >>= 1; - } - } - - fn heapify(&mut self, i: usize) { - let l = i << 1; - let r = l | 1; - - let mut max = i; - if l <= self.size && !self.compare(l, max) { - max = l; - } - if r <= self.size && !self.compare(r, max) { - max = r; - } - - if max != i { - let temp = self.array[i]; - self.array[i] = self.array[max]; - self.array[max] = temp; - self.heapify(max); - } - } - - fn extract(&mut self) -> T { - let temp = self.array[1]; - self.array[1] = self.array[self.size]; - self.array[self.size] = temp; - self.size -= 1; - - self.heapify(1); - - self.array[self.size + 1] - } - - fn compare(&self, x: usize, y: usize) -> bool { - match self.is_minheap { - false => self.array[x] < self.array[y], - true => self.array[x] > self.array[y], - } - } -} - -fn build<T: PartialOrd + Copy + Default>(array: [T; 32], n: usize) -> Heap<T> { - let mut heap = Heap::<T>::new(); - - heap.size = n; - heap.array = array; - - for i in (1..=n / 2).rev() { - heap.heapify(i); - } - - heap -} - -fn heapsort<T: PartialOrd + Copy + Default>(array: [T; 32], n: usize) -> [T; 32] { - let mut heap = build(array, n); - let mut arr: [T; 32] = [T::default(); 32]; - for i in (0..n).rev() { - arr[i] = heap.extract(); - } - - arr -} - -fn main() { - let mut h = Heap::<i32>::new(); - println!("{:?}", h.array); - h.insert(5); - h.insert(24); - h.insert(1); - h.insert(12); - h.insert(35); - h.insert(-1); - println!("{:?}\n", h.array); - - let mut arr: [i32; 32] = [0; 32]; - arr[1] = 5; - arr[2] = 24; - arr[3] = 1; - arr[4] = 12; - arr[5] = 35; - arr[6] = -1; - println!("{:?}", &arr); - let hh = heapsort(arr, 6); - println!("{:?}", hh); -} |