Cod sursa(job #1312733)

Utilizator SorinmocanuFMI Sorin Mocanu Sorinmocanu Data 9 ianuarie 2015 21:27:20
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 0.75 kb
#include<iostream>
#include<fstream>
#include<stdlib.h>
#include<time.h>
using namespace std;
int a[500000],n,k;

void quick(int st, int dr)
{
    if(st>=dr) return;
    int i=st,j=dr,p,m
    p=a[st+rand()%(dr-st+1)];
    while(i<=j)
    {
        while(i<=dr&&a[i]<p) i++;
        while(j>=st&&a[j]>p) j--;
        if(i<=j)
            {if(a[i]!=a[j]) a[i]=a[i]+a[j]-(a[j]=a[i]);
            i++; j--;}
    }
    if(st<j) quick(st,j);
    if(i<dr) quick(i,dr);
}

int main()
{
    ifstream f("algsort.in");
    ofstream g("algsort.out");
    int i;
    f>>n;
    for(i=1;i<=n;i++)
        f>>a[i];
    srand(time(NULL));
    quick(1,n);
    for(i=1;i<=n;i++)
        g<<a[i]<<" ";
    f.close();
    f.close();
    return 0;
}