Cod sursa(job #1951644)

Utilizator Diana-LaviniaPrepelita Diana-Lavinia Diana-Lavinia Data 3 aprilie 2017 18:58:10
Problema Sortare prin comparare Scor 60
Compilator cpp Status done
Runda Arhiva educationala Marime 1 kb
#include<iostream>
#include<fstream>
#include<stdlib.h>
using namespace std;
ifstream fin("algsort.in");
ofstream fout("algsort.out");
int a[500002];
int selectare(int a[],int p,int r)
{
    int i,j,di,dj;
    int aux;
    i=p;j=r;
    di=1;dj=0;
    while(i<j){
        if(a[i]>a[j]){
            aux=a[i];
            a[i]=a[j];
            a[j]=aux;
            di=1-di;
            dj=1-dj;
        }
        i=i+di;
        j=j-dj;
    }
    return i;
}
void qsort(int a[],int p,int r)
{
    int q;
    if(p<r){
        q=selectare(a,p,r);
        qsort(a,p,q-1);
        qsort(a,q+1,r);
    }
}
int main()
{
    int n,i,aux;
    long long p,q;
    fin>>n;
    for(i=1;i<=n;i++){
        fin>>a[i];
    }
    for(i=1;i<=n;i++){
        p=rand();
        p=(p*rand())%n+1;
        q=rand();
        q=(q*rand())%n+1;
        aux=a[p];
        a[p]=a[q];
        a[q]=aux;
    }
    qsort(a,1,n);
    for(i=1;i<=n;i++){
        fout<<a[i]<<" ";
    }
    return 0;
}