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Cod sursa(job #894822)
#include <cstdio>
#define MAXN 500010
int h[2*MAXN+100],k,n;
void swap(int x,int y)
{
int aux=h[x];
h[x]=h[y];
h[y]=aux;
}
void upheap(int i)
{
while(i>1 && h[i/2]>h[i])
{
swap(i/2,i);
i=i/2;
}
}
void downheap(int i)
{
int stg,dr,max=i;
stg=2*i;
dr=2*i+1;
if(stg<=k && h[stg]<h[i])
max=stg;
if(dr<=k && h[dr]<h[max])
max=dr;
if(max!=i)
{
swap(max,i);
downheap(max);
}
}
void insert_heap(int val)
{
h[++k]=val;
upheap(k);
}
int extract_min()
{
int min=h[1];
swap(1,k);
k--;
downheap(1);
return min;
}
int main()
{
freopen("algsort.in","r",stdin);
freopen("algsort.out","w",stdout);
scanf("%d",&n);
int j;
for(j=1;j<=n;j++)
{
int i;
scanf("%d ",&i);
insert_heap(i);
}
while(k)
{
printf("%d ",extract_min());
}
printf("\n");
return 0;
}