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Cod sursa(job #393799)
#include<fstream.h>
#define Nmax 500010
int h[Nmax],K,Q,N,o=0;
int tata(int k)
{
return (k/2);
}
int fiu1(int k)
{
return 2*k;
}
int fiu2(int k)
{
return 2*k+1;
}
void swap(int x,int y)
{
int aux;
aux=h[x];
h[x]=h[y];
h[y]=aux;
}
int up_heap(int k)
{//afis();
if(k==1)
return 0;
int t;
t=tata(k);
if(h[t]>h[k])
{
swap(k,t);
up_heap(t);
}
return 0;
}
int down_heap(int k)
{//printf("%d\n",k);
int s1=fiu1(k),s2=fiu2(k);
if(s1<=K&&s2<=K)
{
if(h[s1]<h[s2])
{
if(h[k]>h[s1])
{
swap(k,s1);
down_heap(s1);
}
}
else if(s2<=K)
{
if(h[k]>h[s2])
{
swap(k,s2);
down_heap(s2);
}
}
}
else if(s1<=K)
{
if(h[k]>h[s1])
{
swap(k,s1);
down_heap(s1);
}
}
}
int main()
{
ifstream fin("algsort.in");
ofstream fout("algsort.out");
int x,y;
fin>>N;
for(int i=1;i<=N;++i)
{ fin>>h[i];
++K;
up_heap(i);
}
for(int i=1;i<=N;++i)
{
fout<<h[1];
h[1]=h[K--];
down_heap(1);
}
return 0;
}