Cod sursa(job #1868723)

Utilizator silviuilasSilviu Ilas silviuilas Data 5 februarie 2017 11:56:47
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.66 kb
#include <bits/stdc++.h>

using namespace std;
ifstream f("algsort.in");
ofstream g("algsort.out");
int n,v[500010];
void quick_sort(int,int);
int main()
{
    f>>n;
    srand(time(0));
    for(int i=1;i<=n;i++)
        f>>v[i];
    quick_sort(1,n);
    for(int i=1;i<=n;i++)
        g<<v[i]<<' ';
    return 0;
}
void quick_sort(int lo,int hi)
{
    if(lo>=hi)return;
    int st=lo,dr=hi,mi;
    mi=st+rand()%(dr-st+1);
    mi=v[mi];
    do
    {
        while(v[st]<mi)st++;
        while(v[dr]>mi)dr--;
        if(st<=dr){swap(v[st],v[dr]);st++;dr--;}
    }while(st<=dr);
    if(dr>lo)quick_sort(lo,dr);
    if(st<hi)quick_sort(st,hi);
}