Cod sursa(job #1250283)

Utilizator scipianusFMI Ciprian Olariu scipianus Data 27 octombrie 2014 23:06:08
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.8 kb
#include <fstream>
using namespace std;
int n, v[500100];

inline void Swap(int &a, int &b)
{
	if(a == b)
		return;
	a ^= b ^= a ^= b;
}

inline void QuickSort(int st, int dr)
{
	if(st >= dr)
		return;
	int mij = ((st + dr) >> 1), i, j, pivot;
	pivot = v[mij];
	i = st;
	j = dr;
	while(i <= j)
	{
		while(i <= dr && v[i] < pivot)
			i++;
		while(j >= st && v[j] > pivot)
			j--;
		if(i <= j)
		{
			Swap(v[i], v[j]);
			i++;
			j--;
		}
	}
	if(st < j)
		QuickSort(st, j);
	if(i < dr)
		QuickSort(i, dr);
}

int main()
{
	int i;
	ifstream fin("algsort.in");
	fin >> n;
	for(i = 1; i <= n; ++i)
		fin >> v[i];
	fin.close();
	
	QuickSort(1, n);
	
	ofstream fout("algsort.out");
	for(i = 1; i <= n; ++i)
		fout << v[i] << ' ';
	fout << "\n";
	fout.close();
	return 0;
}