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Cod sursa(job #271531)
#include<fstream>
using namespace std;
int a[500010],n,i;
void interclasare(int p, int m, int q)
{ int i=p, j=m+1, k=0;
int b[500010];
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];
}
void msort(int p, int q)
{ if(q>p)
{ int m=(p+q)/2;
msort(p,m);
msort(m+1,q);
interclasare(p,m,q);
}
}
int main()
{
ifstream f("algsort.in");
ofstream g("algsort.out");
f>>n;
for(i=1;i<=n;i++) f>>a[i];
msort(1,n);
for(i=1;i<=n;i++) g<<a[i]<<" ";
f.close();
g.close();
return 0;
}