RACSO
DFA
CFG
Operations:
Reg
,
CF
PDA
Reductions:
K
,
WP
,
CFG
,
NP
,
SAT
ANTLR:
lexical
,
syntactic
Exams
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Exercise
‹
7
›
:
Context-free description for
{
a
i
b
j
a
k
b
r
a
s
b
t
∣
i
+
k
+
s
=
2
(
j
+
r
+
t
)
}
\{ a^ib^ja^kb^ra^sb^t \mid i+k+s=2(j+r+t) \}
{
a
i
b
j
a
k
b
r
a
s
b
t
∣
i
+
k
+
s
=
2
(
j
+
r
+
t
)}
Give a context-free description for the set of words of the form
a
i
b
j
a
k
b
r
a
s
b
t
a^ib^ja^kb^ra^sb^t
a
i
b
j
a
k
b
r
a
s
b
t
such that
i
+
k
+
s
=
2
(
j
+
r
+
t
)
i+k+s=2(j+r+t)
i
+
k
+
s
=
2
(
j
+
r
+
t
)
.
Authors:
Guillem Godoy /
Documentation:
main { // Write here your context-free description... }
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