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Cod sursa(job #615363)
#include<cstdio>
#include<queue>
using namespace std;
#define NM 500001
int v[NM],p[NM];
void mergesort(int x, int y)
{
if (x==y)
return;
mergesort(x,(x+y)>>1);
mergesort(((x+y)>>1)+1,y);
int N=(x+y)>>1,i,j;
p[0]=0;
for (i=x,j=N+1; i<=N && j<=y; )
{
if (v[i]<v[j])
{
p[++p[0]]=v[i];
++i;
continue;
}
if (v[i]>v[j])
{
p[++p[0]]=v[j];
++j;
continue;
}
p[++p[0]]=v[i];
p[++p[0]]=v[j];
++i;
++j;
}
while (i<=N)
{
p[++p[0]]=v[i];
++i;
}
while (j<=y)
{
p[++p[0]]=v[j];
++j;
}
for (i=x,j=1; i<=y; ++i,++j)
v[i]=p[j];
}
void afis(int N)
{
for (int i=1; i<=N; ++i)
printf("%d ",v[i]);
}
int main()
{
freopen("algsort.in","r",stdin);
freopen("algsort.out","w",stdout);
int N;
scanf("%d",&N);
for(int i=1; i<=N; ++i)
scanf("%d",&v[i]);
mergesort(1,N);
afis(N);
return 0;
}