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Cod sursa(job #643155)
#include <iostream>
#include <fstream>
using namespace std;
int a[500001],n;
void interclas(int i,int m,int j)
{
int b[500001];
int x=i;
int k=1;
int y=m+1;
while(x<=m && y<=j)
if (a[x]<a[y])
b[k++]=a[x++];
else
b[k++]=a[y++];
while (x<=m)
b[k++]=a[x++];
while (y<=j)
b[k++]=a[y++];
int t=i;
for (k=1;k<=(j-i)+1;k++)
a[t++]=b[k];
}
void divimp(int i,int j)
{
if (i<j)
{int m=(i+j)/2;
divimp(i,m);
divimp(m+1,j);
interclas(i,m,j);}
}
int main()
{
int i;
ifstream in ("algsort.in");
in>>n;
for(int i=1;i<=n;i++)
in>>a[i];
divimp(1,n);
ofstream out ("algsort.out");
for(i=1;i<=n;i++)
out<<a[i]<<" ";
return 0;
}