Pagini recente » Monitorul de evaluare | Cod sursa (job #1330604) | Profil Florin77 | Cod sursa (job #233746) | Cod sursa (job #1330689)
#include <fstream>
#include <stdlib.h>
#include <time.h>
#define DIM 500002
using namespace std;
ifstream fin("algsort.in");
ofstream fout("algsort.out");
int N,v[DIM];
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);
else
quicksort(poz+1,u);
}
int main(){
fin>>N;
srand(time(0));
for(int i=1;i<=N;i++)
fin>>v[i];
quicksort(1,N);
for(int i=1;i<=N;i++)
fout<<v[i]<<" ";
fin.close();fout.close();
return 0;
}