Cod sursa(job #650035)
#include<stdio.h>
using namespace std;
int a[500001],n;
void sort(int p,int q, int a[500001])
{
int m;
if(a[p]>a[q]) m=a[p],a[p]=a[q],a[q]=m;
}
void interclasare(int p,int q,int m,int a[5000001])
{
int i,j,k=1,b[500001];
i=p,j=m+1;
while(i<=m && j<=q)
if(a[i]<=a[j])
b[k++]=a[i],++i;
else
b[k++]=a[j],++j;
if(i<=m)
for(j=i;j<=m;j++)
b[k++]=a[j];
else
for(i=j;i<=q;i++)
b[k++]=a[i];
k=1;
for(i=p;i<=q;i++)
a[i]=b[k++];
}
void merge(int p,int q, int a[500001])
{
int m;
if((q-p)<=1)
sort(p,q,a);
else
{
m=(p+q)/2;
merge(p,m,a);
merge(m+1,q,a);
interclasare(p,q,m,a);
}
}
int main()
{
int 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(1,n,a);
for(i=1;i<=n;i++)
printf("%d ",a[i]);
return 0;
}