Cod sursa(job #2219765)

Utilizator adimiclaus15Miclaus Adrian Stefan adimiclaus15 Data 9 iulie 2018 17:26:40
Problema Statistici de ordine Scor 60
Compilator cpp Status done
Runda Arhiva educationala Marime 1.04 kb
#include <iostream>
#include <fstream>
using namespace std;
ifstream f("sdo.in");
ofstream g("sdo.out");
long long n,k,a[3000001];
unsigned int partitionare(long long st,long long dr)
{
    long long mij,aux,i,j;
    mij=a[(st+dr)/2];
    i=st-1;
    j=dr+1;
    while(i<j)
    {
        do
        {
            i++;
        }
        while(a[i]<mij);
        do
        {
            j--;
        }
        while(a[j]>mij);
        if(i<j)
        {
            aux=a[i];
            a[i]=a[j];
            a[j]=aux;
        }
    }
    return j;
}
void statistica(long long st,long long dr)
{
    long long poz;
    poz=partitionare(st,dr);
    //cout<<poz<<" ";
    if(poz==k)
    {
        g<<a[k]<<" ";
    }
    else
    {
        if(poz<k)
        {
            statistica(poz,dr);
        }
        else
        {
            statistica(st,poz);
        }
    }
}
int main()
{
    long long i;
    f>>n>>k;
    for(i=1;i<=n;i++)
    {
        f>>a[i];
    }
    statistica(1,n);
    return 0;
}