Cod sursa(job #655742)

Utilizator danirotRotaru Daniel danirot Data 3 ianuarie 2012 13:48:05
Problema Sortare prin comparare Scor 20
Compilator cpp Status done
Runda Arhiva educationala Marime 0.86 kb
#include <stdio.h>
int a[50];
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[50],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()
{
 int n,i;
 freopen("algsort.in","r",stdin);
 freopen("algsort.out","w",stdout);
 scanf("%d",&n);
 for(i=1;i<=n;i++)
 {
  scanf("%d",&a[i]);
 }
 merge_sort(1,n);
 for(i=1;i<=n;i++)
 printf("%d  ",a[i]);

}