Cod sursa(job #1085496)

Utilizator ELHoriaHoria Cretescu ELHoria Data 17 ianuarie 2014 02:04:00
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.8 kb
#include <fstream>
#include <algorithm>
#include <vector>
#include <math.h>
#include <functional>

using namespace std;

int main()
{
	ifstream cin("algsort.in");
	ofstream cout("algsort.out");
	/*
		Shell sort	
		gap de forma 4^k + 2^(k - 1) + 1
		prefixat cu 1
		O(N^(4/3))
	*/
	vector<int> gaps;
	for (int k = 9; k > 0; k--) {
		gaps.push_back((1 << (k * 2)) + 3 * (1 << (k - 1)) + 1);
	}
	gaps.push_back(1);
	int n;
	cin >> n;
	int *a = new int[n];
	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}

	for (const int &gap : gaps) {
		int i, j, temp;
		for (i = gap; i < n; i++) {
			temp = a[i];
			for (j = i; j >= gap && a[j - gap] > temp; j -= gap) {
				a[j] = a[j - gap];
			}
			a[j] = temp;
		}
	}

	for (int i = 0; i < n; i++) {
		cout << a[i] << " ";
	}

	return 0;
}