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Cod sursa(job #962846)
#include<iostream>
#include<fstream>
using namespace std;
long v[500001],n,i;
void mergesort(long i,long m,long j)
{long a[500001],x=i,k=1,y=m+1;
while(x<=m && y<=j)
if (v[x]<v[y])
a[k++]=v[x++];
else
a[k++]=v[y++];
while (x<=m)
a[k++]=v[x++];
while (y<=j)
a[k++]=v[y++];
int t=i;
for (k=1;k<=(j-i)+1;k++)
v[t++]=a[k];
}
void divimp(long i,long j)
{if (i<j)
{long m=(i+j)/2;
divimp(i,m);
divimp(m+1,j);
mergesort(i,m,j);}
}
int main()
{
ifstream f("agsort.in");
ofstream g("algsort.out");
f>>n;
for(i=1;i<=n;i++)
f>>v[i];
divimp(1,n);
for(i=1;i<=n;i++)
g<<v[i]<<" ";
}