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1098 Insertion or Heap Sort (25 分)

2021/8/21 23:46:32 浏览:
#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
#define PARANT(x) (((x)-1) >> 1)
#define LCHILD(x) (((x) << 1) + 1)
#define RCHILD(x) (((x) + 1) << 1)
#define INHEAP(n, x) (((x) >= 0) && ((x) < (n)))
// inline bool INHEAP(int n, int x)
// {
//     return (((x) >= 0) && ((x) < (n)));
// }
int N, tmp;
vector<int> initial, partial;
void insertion_sort()
{
    vector<int> insert = initial;
    bool flag = false;
    int cur = 1, i = 0, tmp = 0;
    while (cur < N)
    {
        tmp = insert[cur];
        for (i = 0; i < cur; i++)
        {
            if (insert[i] >= insert[cur])
                break;
        }
        for (int j = cur; j > i; j--)
        {
            insert[j] = insert[j - 1];
        }
        insert[i] = tmp;
        if (flag == true)
            break;
        if (insert == partial)
            flag = true;

        cur++;
    }
    if (flag == true)
    {
        printf("Insertion Sort\n");
        for (int i = 0; i < N; i++)
        {
            printf("%d", insert[i]);
            if (i != N - 1)
                printf(" ");
            else
                printf("\n");
        }
        exit(0);
    }
}
void perlocate_down(vector<int> &heap, int x, int n)
{
    while (INHEAP(n, LCHILD(x)))
    {
        if (INHEAP(n, RCHILD(x)))
        {
            if (heap[x] < heap[LCHILD(x)] && heap[LCHILD(x)] <= heap[RCHILD(x)])
            {
                swap(heap[x], heap[RCHILD(x)]);
                x = RCHILD(x);
            }
            else if (heap[x] < heap[RCHILD(x)] && heap[RCHILD(x)] <= heap[LCHILD(x)])
            {
                swap(heap[x], heap[LCHILD(x)]);
                x = LCHILD(x);
            }
            else if (heap[x] < heap[LCHILD(x)])
            {
                swap(heap[x], heap[LCHILD(x)]);
                x = LCHILD(x);
            }
            else if (heap[x] < heap[RCHILD(x)])
            {
                swap(heap[x], heap[RCHILD(x)]);
                x = RCHILD(x);
            }
            else
                break;
        }
        else
        {
            if (heap[x] >= heap[LCHILD(x)])
                break;
            else
            {
                swap(heap[x], heap[LCHILD(x)]);
                x = LCHILD(x);
            }
        }
    }
}

void heap_sort()
{
    vector<int> heap = initial;
    bool flag = false;
    for (int i = PARANT(N - 1); i >= 0; i--)
        perlocate_down(heap, i, N);
    for (int i = N - 1; i > 0; i--)
    {
        swap(heap[0], heap[i]);
        perlocate_down(heap, 0, i);
        if (flag == true)
            break;
        if (heap == partial)
            flag = true;
    }
    if (flag == true)
    {
        printf("Heap Sort\n");
        for (int i = 0; i < N; i++)
        {
            printf("%d", heap[i]);
            if (i != N - 1)
                printf(" ");
            else
                printf("\n");
        }
        exit(0);
    }
}
int main()
{

    scanf("%d", &N);
    for (int i = 0; i < N; i++)
    {
        scanf("%d", &tmp);
        initial.push_back(tmp);
    }
    for (int i = 0; i < N; i++)
    {
        scanf("%d", &tmp);
        partial.push_back(tmp);
    }
    insertion_sort();
    heap_sort();
    return 0;
}

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