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## Zajęcia 1
Copyright AMU Poznan
Made by multiple people
### Informacje na temat przedmiotu
Prowadzący: Jacek Kałużny

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Read a description of a deterministic finite-state automaton in the AT&T format
(without weights) from the file in the first argument.
Read strings from the standard input.
If a string is accepted by the
automaton, write YES, otherwise- write NO.
The program is invoked like this: ./run.py fsa_description.arg < test1.in > test1.out

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0 1 x
1 2 y
2 3 z
0 4 y
0 4 z
1 4 x
1 4 z
2 4 x
2 4 y
3 4 x
3 4 y
3 4 z
4 4 x
4 4 y
4 4 z
3

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import sys
def is_accepted(fsa, input_string):
current_state = 0
for symbol in input_string:
if (current_state, symbol) in fsa:
current_state = fsa[(current_state, symbol)]
else:
return False
return current_state == 4
fsa_file = sys.argv[1]
fsa = {}
with open(fsa_file, 'r') as f:
for line in f:
parts = line.strip().split('\t')
if len(parts) == 3:
state, next_state, symbol = parts
fsa[(int(state), symbol)] = int(next_state)
for line in sys.stdin:
input_string = line.strip()
if is_accepted(fsa, input_string):
print("YES")
else:
print("NO")

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xxyz
xyz
xy
zz
xxy
yzx
x
xyzz

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Use a deterministic finite-state automaton (FSA) engine from the TaskE00.
Create your own FSA description to check whether the string starts with "01" and ends with "01.
Save it to fsa_description.arg file.
The alphabet is "0", "1".
Read strings from the standard input.
If a string is accepted by the
automaton, write YES, otherwise- write NO.

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0 1 0
0 3 1
3 3 0
3 3 1
1 3 0
1 2 1
2 4 1
4 4 1
4 5 0
5 5 0
2 5 0
5 2 1

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import sys
def is_accepted(fsa, input_string):
current_state = 0
for symbol in input_string:
if (current_state, symbol) in fsa:
current_state = fsa[(current_state, symbol)]
else:
return False
return current_state == 2
fsa_file = sys.argv[1]
fsa = {}
with open(fsa_file, 'r') as f:
for line in f:
parts = line.strip().split(' ')
if len(parts) == 3:
state, next_state, symbol = parts
fsa[(int(state), symbol)] = int(next_state)
for line in sys.stdin:
input_string = line.strip()
if is_accepted(fsa, input_string):
print("YES")
else:
print("NO")

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01
10
0101
1010
011101
101010
100010
0100001
00110
0000
10101
0
1

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Use a deterministic finite-state automaton (FSA) engine from the TaskE00.
Create your own FSA description to check whether the string starts with "10" and ends with "10.
Save it to fsa_description.arg file.
The alphabet is "0", "1".
Read strings from the standard input.
If a string is accepted by the
automaton, write YES, otherwise- write NO.

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NO
YES
NO
YES
NO
YES
YES
NO
NO
NO
NO
NO
NO
NO

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01
10
0101
1010
011101
101010
100010
0100001
00110
0000
10101
0
1

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Use a deterministic finite-state automaton (FSA) engine from the TaskE00.
Create your own FSA description to check whether the string contains "0"
even number of times.
Save it to fsa_description.arg file.
The alphabet is "0", "1".
Read strings from the standard input.
If a string is accepted by the
automaton, write YES, otherwise- write NO.

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NO
NO
YES
YES
YES
NO
YES
NO
YES
NO
YES
YES
NO
YES

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01
10
0101
1010
011101
101010
100010
0100001
00110
0000
10101
0
1

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Use a deterministic finite-state automaton (FSA) engine from the TaskE00.
Create your own FSA description to check whether the string contains "0"
odd number of times.
Save it to fsa_description.arg file.
The alphabet is "0", "1".
Read strings from the standard input.
If a string is accepted by the
automaton, write YES, otherwise- write NO.

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YES
YES
NO
NO
NO
YES
NO
YES
NO
YES
NO
NO
YES
NO

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01
10
0101
1010
011101
101010
100010
0100001
00110
0000
10101
0
1

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Use a deterministic finite-state automaton (FSA) engine from the TaskB00.
Create your own FSA description to check whether the line contains string '19DD', where D is a digit.
Save it to fsa_description.arg file.
FSA alphabet is '0123456789x'.
Read strings from the standard input.
If a string is accepted by the
automaton, write YES, otherwise- write NO.

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NO
YES
NO
NO
YES
YES

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3214545443
1910
19
xxx2190x
xxx21905x
1905x54545

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Use a deterministic finite-state automaton (FSA) engine from the previous task.
Create your own FSA description to check whether the word "hamlet" is in the given line.
Save it to fsa_description.arg file.
FSA alphabet is 'abcdefghijklmnopqrstuvwxyz '.
Read strings from the standard input.
If a string is accepted by the
automaton, write YES, otherwise- write NO.

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NO
YES
YES

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haml
hamlet
aaahamletbbb

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Use a deterministic finite-state automaton (FSA) engine from the previous task.
Create your own FSA description to check whether the word "ophelia" is in the given line.
Save it to fsa_description.arg file.
FSA alphabet is 'abcdefghijklmnopqrstuvwxyz '.
Read strings from the standard input.
If a string is accepted by the
automaton, write YES, otherwise- write NO.

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NO
YES
YES

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oph
ophelia
xfdfdopheliafff

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Use a deterministic finite-state automaton (FSA) engine from the previous task.
Create your own FSA description to check whether the word "juliet" is in the given line.
Save it to fsa_description.arg file.
FSA alphabet is 'abcdefghijklmnopqrstuvwxyz '.
Read strings from the standard input.
If a string is accepted by the
automaton, write YES, otherwise- write NO.

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NO
YES
YES

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juli
juliet
dgfdgjulietaaa

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Use a deterministic finite-state automaton (FSA) engine from the previous task.
Create your own FSA description to check whether the word "macbeth" is in the given line.
Save it to fsa_description.arg file.
FSA alphabet is 'abcdefghijklmnopqrstuvwxyz '.
Read strings from the standard input.
If a string is accepted by the
automaton, write YES, otherwise- write NO.

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NO
YES
YES

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macb
macbeth
xadadamacbethrff