Cod sursa(job #1160053)

Utilizator radu_cebotariRadu Cebotari radu_cebotari Data 30 martie 2014 10:27:34
Problema Sortare prin comparare Scor 100
Compilator cpp Status done
Runda Arhiva educationala Marime 0.94 kb
#include<fstream>
using namespace std;
int a[600000],n;
void merge(int,int,int);
void merge_sort(int low,int high)
{
 int mid;
 if(low<high)
 {
  mid=(low+high)/2;
  merge_sort(low,mid);
  merge_sort(mid+1,high);
  merge(low,mid,high);
 }
}
void merge(int low,int mid,int high)
{
 int h,i,j,b[600000],k;
 h=low;
 i=low;
 j=mid+1;

 while((h<=mid)&&(j<=high))
 {
  if(a[h]<=a[j])
  {
   b[i]=a[h];
   h++;
  }
  else
  {
   b[i]=a[j];
   j++;
  }
  i++;
 }
 if(h>mid)
 {
  for(k=j;k<=high;k++)
  {
   b[i]=a[k];
   i++;
  }
 }
 else
 {
  for(k=h;k<=mid;k++)
  {
   b[i]=a[k];
   i++;
  }
 }
 for(k=low;k<=high;k++) a[k]=b[k];
}

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