int
s
[
2
]
;
x
(
)
{
if
(
!
s
[
0
]
)
{
s
[
1
+
s
[
1
]
]
=
s
[
1
]
;
return
1
;
}
}
main
(
)
{
s
[
0
]
=
s
[
1
]
=
0
;
if
(
x
(
0
)
!
=
1
)
abort
(
)
;
exit
(
0
)
;
}
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