Cod sursa(job #2296932)

Utilizator Dragomiralexandru621@yahoo.comDragomir ionut alexandru [email protected] Data 5 decembrie 2018 08:59:57
Problema Sortare prin comparare Scor 0
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 1.2 kb

#include <iostream>
#include <fstream>
using namespace std;
ifstream f("algsort.in") ;
ofstream g("algsort.out") ;
long long x[5000001] , n , i ;

void interclaseaza(int st, int mij, int dr)
{
    long long i, j, k = 0, y[100001] ;
    i = st;
    j = mij + 1;


    while (i <= mij && j <= dr)
    {
        if (x[i] <= x[j])
        {
            k++;
            y[k] = x[i];
            i++;
        }
        else
        {
            k++;
            y[k] = x[j];
            j++;
        }
    }
    while (i <= mij)
    {
        k++;
        y[k] = x[i];
        ++i;
    }
    while (j <= dr)
    {
        k++;
        y[k] = x[j];
        ++j;
    }

    k=1;
    for (i = st; i <= dr; ++i)
        {
            x[i] = y[k];
            k++;
        }
}

 void mergesort( int st , int dr)
 {
     if( st < dr )
        {
     mergesort( st , ( st + dr ) / 2 ) ;
     mergesort( ( st + dr ) / 2 + 1 , dr ) ;
     interclaseaza( st , ( st + dr ) / 2 , dr ) ; }
 }
int main()
{
    f >> n ;
    for( i = 1 ; i <= n ; i ++ )
        f >> x[i] ;
    mergesort( 1 , n ) ;
    for( int i = 1 ; i <= n ; i ++ )
        g << " " << x[i] ;
    return 0 ;
}