Cod sursa(job #1875878)

Utilizator ZeBuGgErCasapu Andreas ZeBuGgEr Data 11 februarie 2017 18:25:01
Problema Sortare prin comparare Scor 40
Compilator cpp Status done
Runda Arhiva educationala Marime 0.97 kb
#include<cstdio>
#include<ctime>
#include<algorithm>

using namespace std;

int n;
int v[500001];

int random(int mn,int mx)
{
    return mn+1+(rand()%mx);
}

void quick_sort(int l,int r)
{
    if(l>=r)
    {
        return;
    }
    int pivot=v[random(l,r)];
    int go_l=l,go_r=r;
    while(go_l<=go_r)
    {
        while(go_l<=r&&v[go_l]<pivot)
        {
            go_l++;
        }
        while(go_r>=l&&v[go_r]>pivot)
        {
            go_r--;
        }
        if(go_l<=go_r)
        {
            swap(v[go_l],v[go_r]);
            go_l++;
            go_r--;
        }
    }
    quick_sort(l,go_r);
    quick_sort(go_l,r);
}

int main()
{
    freopen("algsort.in","r",stdin);
    freopen("algsort.out","w",stdout);
    srand(time(NULL));

    scanf("%d",&n);
    for(int i=1;i<=n;i++)
    {
        scanf("%d",&v[i]);
    }

    quick_sort(1,n);

    for(int i=1;i<=n;i++)
    {
        printf("%d ",v[i]);
    }
}