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Cod sursa(job #627900)
#include <fstream>
using namespace std;
ifstream fi("algsort.in");
ofstream fo("algsort.out");
int a[500002],n;
void citire()
{
fi>>n;
for(int i=1;i<=n;i++)
fi>>a[i];
fi.close();
}
void interclasare(int p,int m,int q)
{
int i=p,j=m+1,k=1;
int b[500002];
while(i<=m && j<=q)
{
if(a[i]<a[j])
b[k++]=a[i++];
else b[k++]=a[j++];
}
while(i<=m)
b[k++]=a[i++];
while(j<=q)
b[k++]=a[j++];
for(i=p;i<=q;i++)
a[i]=b[i-p+1];
}
void mergeSort(int p,int q)
{
if(q>p)
{
int m=(p+q)/2;
mergeSort(p,m);
mergeSort(m+1,q);
interclasare(p,m,q);
}
}
void afisare()
{
for(int i=1;i<=n;i++)
fo<<a[i]<<" ";
fo<<"\n";
fo.close();
}
int main()
{
citire();
mergeSort(1,n);
afisare();
return 0;
}