Pagini recente » Istoria paginii utilizator/cristicnpr | Statistici Test Test (test12321) | Profil Tudor.Badici | Monitorul de evaluare | Cod sursa (job #1330703)
#include <cstdio>
#include <stdlib.h>
#include <time.h>
#define DIM 500002
using namespace std;
int N,v[DIM];
void swap(int &i,int &j){
int aux=i;
i=j;
j=aux;
}
int part(int p,int u){
int x=p+rand()%(u-p+1);
swap(v[p],v[x]);
int i=p,j=u;
int ii=0,jj=-1;
while(i!=j){
if(v[i]>v[j]){
swap(v[i],v[j]);
swap(ii,jj);
ii*=-1;
jj*=-1;
}
i+=ii;
j+=jj;
}
return i;
}
void quicksort(int p,int u){
if(p>=u)
return;
int poz=part(p,u);
if(p<poz-1)
quicksort(p,poz-1);
if(u>poz+1)
quicksort(poz+1,u);
}
int main(){
freopen("algsort.in","r",stdin);
freopen("algsort.out","w",stdout);
scanf("%d",&N);
srand(time(0));
for(int i=1;i<=N;i++)
scanf("%d",&v[i]);
quicksort(1,N);
for(int i=1;i<=N;i++)
printf("%d ",v[i]);
fclose(stdin);fclose(stdout);
return 0;
}