97 lines
2.4 KiB
Python
97 lines
2.4 KiB
Python
# B00 (2021)
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#
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import sys
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class FSA:
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def __init__(self):
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self.initial_state = '0' # zakładamy dla uproszczenia, że initial state = 0
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self.final_states = set()
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self.transitions = dict()
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self.alphabet = set()
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def add_transition(self, state_from, state_to, symbol):
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if state_from in self.transitions.keys():
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self.transitions[state_from][symbol] = state_to
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else:
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self.transitions[state_from] = dict()
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self.transitions[state_from][symbol] = state_to
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def add_final_state(self, state):
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self.final_states.add(state)
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def get_final_state(self, string):
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current_state = self.initial_state
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for symbol in string:
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current_state = self.transitions[current_state][symbol]
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return current_state
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def accepts(self, string):
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if self.get_final_state(string) in self.final_states:
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return True
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else:
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return False
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fsa = FSA()
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# def build_fsa(self): #, dfa_desciption
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table = open(sys.argv[1]) # dfa_desciption
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for line in table:
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line = line.rstrip('\n')
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if len(line.split('\t')) == 3:
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a, b, c = line.split('\t')
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fsa.add_transition(a, b, c) #self
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fsa.alphabet.add(c) #self
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elif len(line.split('\t')) == 1:
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fsa.add_final_state(line) #self
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else:
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assert False
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# def run_dfa(self): # , input
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for line in sys.stdin: # open(input)
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line = line.rstrip()
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line_n = list(line)
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for i in range(len(line_n)):
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if line_n[i] not in fsa.alphabet: #self
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line_n[i] = 'x'
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if fsa.accepts(line_n): #self
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print('YES')
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else:
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print('NO')
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# def run_dfa_and_compare(self, input, expected):
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#
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# accepts = []
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#
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# for line in open(input): # sys.stdin
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# line = line.rstrip()
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#
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# line_n = list(line)
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#
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# for i in range(len(line_n)):
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# if line_n[i] not in self.alphabet:
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# line_n[i] = 'x'
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#
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# if self.accepts(line_n):
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# accepts.append('YES')
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# else:
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# accepts.append('NO')
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#
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# i = 0
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# for line in open(expected):
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# if line.rstrip() != accepts[i]:
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# print('Incorrect in line ' + str(i))
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# return
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# i = i + 1
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# print('Correct')
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