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Cod sursa(job #393076)
#include<fstream.h>
int a[500001];
inline int max(int i,int n)
{
if(2*i+1>n)return 2*i;
if(a[2*i+1]>a[2*i])return 2*i+1;
else return 2*i;
}
inline void combinare(int i,int n)
{
if(2*i>n)return;
int poz,aux;
poz=max(i,n);
if(a[poz]>a[i]){
aux=a[poz];
a[poz]=a[i];
a[i]=aux;
}
combinare(poz,n);
}
void maxheap(int n)
{
int i;
for(i=n/2;i>=1;i--)combinare(i,n);
}
void heapsort(int n)
{
int i,aux;
maxheap(n);
for(i=n;i>1;i--){
aux=a[1];
a[1]=a[i];
a[i]=aux;
combinare(1,i-1);
}
}
int main()
{
ifstream fin("algsort.in");
ofstream fout("algsort.out");
int i,n,j,aux;
fin>>n;
for(i=1;i<=n;i++)fin>>a[i];
heapsort(n);
for(i=1;i<=n;i++)fout<<a[i]<<" ";
return 0;
}