Cod sursa(job #847508)

Utilizator Eby7Elena Obreja Eby7 Data 4 ianuarie 2013 01:04:26
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.52 kb
#include<fstream>
using namespace std;
ifstream f("algsort.in");
ofstream g("algsort.out");
int n,a[500001];
void gen(int l,int r)
{
	int i=l,j=r,m=a[(l+r)/2];
	int aux;
	while(i<j)
	{
		while(a[i]<m)
			i++;
		while(a[j]>m)
			j--;
		if(i<=j)
		{
			//swap(a[i],a[j]);
			aux=a[i];
			a[i]=a[j];
			a[j]=aux;
			i++;
			j--;
		}
	}
	if(j>l)
		gen(l,j);
	if(i<r)
		gen(i,r);
}
int main()
{
	int i;
	f>>n;
	for(i=1;i<=n;i++)
		f>>a[i];
	gen(1,n);
	for(i=1;i<=n;i++)
		g<<a[i]<<" ";
	return 0;
}