Cod sursa(job #1984068)

Utilizator Lazar_LaurentiuLazar Laurentiu Lazar_Laurentiu Data 23 mai 2017 16:42:00
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 1.08 kb
#include <iostream>
#include <fstream>

using namespace std;

int n,a[500001],va[500001];
void interclaseaza(int inc, int sf){
  int mij=(inc+sf)/2,it=0;
  int ind1=inc,ind2=mij+1;
  for(int i=1;i<=sf-inc+1;i++){
    if(ind1>mij){
      va[++it]=a[ind2];
      ind2++;
    } else if(ind2>sf){
      va[++it]=a[ind1];
      ind1++;
    } else {
      if(a[ind1]<=a[ind2]){
        va[++it]=a[ind1];
        ind1++;
      } else {
        va[++it]=a[ind2];
        ind2++;
      }
    }
  }
  for(int i=1,j=inc;i<=it;i++,j++) a[j]=va[i];
}
void sorteaza(int inc,int sf){
  if(inc!=sf){
    int mij=(inc+sf)/2;
    sorteaza(inc,mij);
    sorteaza(mij+1,sf);
//    cout<<inc<<" "<<sf<<'\n';
//    for(int i=1;i<=n;i++)cout<<a[i]<<" ";cout<<"\n";
    interclaseaza(inc,sf);
    //for(int i=1;i<=n;i++)cout<<a[i]<<" ";cout<<"\n\n";
  }
}

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