Cod sursa(job #433770)

Utilizator cosmin79Carabet Cosmin Andrei cosmin79 Data 4 aprilie 2010 11:53:16
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.88 kb
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#define NMAX 500005
int n,A[NMAX],B[NMAX],r,t;
void read()
{
	scanf("%d",&n);
	int i;
	for (i=1; i<=n; i++)
		scanf("%d",&A[i]);
}
void sorteaza(int st,int dr)
{
	if (st==dr || st>dr)
		return ;
	int i,poz=rand()%(dr-st+1)+st,val;
	val=A[poz];
	r=t=0;
	for (i=st; i<=dr; i++)
		if (i!=poz)
			if (A[i]<A[poz])
				B[++r]=A[i];
	for (i=st; i<=dr; i++)
		if (i!=poz)
			if (A[i]>A[poz])
			{
				t++;
				B[r+t]=A[i];
			}
	for (i=1; i<=r; i++)
		A[st+i-1]=B[i];
	A[st+r]=val;
	for (i=r+1; i<=r+t; i++)
		A[st+i]=B[i];
	sorteaza(st,st+r-1);
	sorteaza(st+r+1,dr);
}
void show()
{
	int i;
	for (i=1; i<=n; i++)
		printf("%d ",A[i]);
	printf("\n");
}
int main()
{
	freopen("algsort.in","r",stdin);
	freopen("algsort.out","w",stdout);
	read();
	srand(time(0));
	sorteaza(1,n);
	show();
	return 0;
}