Cod sursa(job #2087161)

Utilizator toadehuPuscasu Razvan Stefan toadehu Data 13 decembrie 2017 08:08:14
Problema Sortare prin comparare Scor 0
Compilator cpp Status done
Runda Arhiva educationala Marime 1.76 kb
#include <bits/stdc++.h>

#define Nmax 511111

using namespace std;

int v[Nmax],aux[Nmax],n;

    ifstream fin ("algsort.in");
    ofstream fout ("algsort.out");

void interclasare(int st , int dr)
{
    int mij=(st+dr)/2,a=st,b=mij+1,i=st;
    while (a<=mij && b<=dr)
    {
        if (v[a]<v[b])
        {
            aux[i]=v[a];
            a++;
            i++;
        }
        else
        {
            aux[i]=v[b];
            b++;
            i++;
        }
        if (a>mij)
        {
            while (b<=dr && i<=dr)
            {
                aux[i]=v[b];
                b++;
                i++;
            }
            break;
        }
        if (b>dr)
        {
            while (a<=mij && i<=dr)
            {
                aux[i]=v[a];
                a++;
                i++;
            }
            break;
        }

    }
    for (int i=st;i<=dr;++i)
    {
        v[i]=aux[i];
    }
}

int brut (int st,int dr)
{
    int vf=1;
    while (vf==1)
    {
        vf=0;
        for (int i=st;i<dr;++i)
        {
            if (v[i]>v[i+1])
            {
                vf=1;
                swap(v[i],v[i+1]);
            }
        }
    }
}

void merge_sort (int st,int dr)
{
    fout<<st<<" "<<dr<<endl;
    if (dr-st+1<=3)
    {
        brut(st,dr);
    }
    else
    {
        int mij=(st+dr)/2;
        merge_sort(st,mij);
        merge_sort (mij+1,dr);
        interclasare(st,dr);
    }
    for (int i=st;i<=dr;++i)
    {
        fout<<v[i]<<" ";
    }
    fout<<endl<<endl;;
}

int main()
{
    fin>>n;
    for (int i=1;i<=n;++i)
    {
        fin>>v[i];
    }
    merge_sort(1,n);
    for (int i=1;i<=n;++i)
    {
        cout<<v[i]<<" ";
    }
}