<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
a	O
mergeable	B-Application
heap	I-Application
(	O
also	O
called	O
a	O
meldable	B-Application
heap	I-Application
)	O
is	O
an	O
abstract	O
data	O
type	O
,	O
which	O
is	O
a	O
heap	B-Application
supporting	O
a	O
merge	O
operation	O
.	O
</s>
<s>
A	O
mergeable	B-Application
heap	I-Application
supports	O
the	O
usual	O
heap	B-Application
operations	O
:	O
</s>
<s>
Make-Heap( )	O
,	O
create	O
an	O
empty	O
heap	B-Application
.	O
</s>
<s>
Insert(H,x )	O
,	O
insert	O
an	O
element	O
x	O
into	O
the	O
heap	B-Application
H	O
.	O
</s>
<s>
Merge(H1,H2 )	O
,	O
combine	O
the	O
elements	O
of	O
H1	O
and	O
H2	O
into	O
a	O
single	O
heap	B-Application
.	O
</s>
<s>
It	O
is	O
straightforward	O
to	O
implement	O
a	O
mergeable	B-Application
heap	I-Application
given	O
a	O
simple	O
heap	B-Application
:	O
</s>
<s>
This	O
can	O
however	O
be	O
wasteful	O
as	O
each	O
Extract-Min(H )	O
and	O
Insert(H,x )	O
typically	O
have	O
to	O
maintain	O
the	O
heap	B-Application
property	I-Application
.	O
</s>
<s>
Examples	O
of	O
mergeable	B-Application
heap	I-Application
data	O
structures	O
include	O
:	O
</s>
<s>
In	O
most	O
mergeable	B-Application
heap	I-Application
structures	O
,	O
merging	O
is	O
the	O
fundamental	O
operation	O
on	O
which	O
others	O
are	O
based	O
.	O
</s>
<s>
Insertion	O
is	O
implemented	O
by	O
merging	O
a	O
new	O
single-element	O
heap	B-Application
with	O
the	O
existing	O
heap	B-Application
.	O
</s>
