import sys def write_answer(answer): with open(output_file, 'a') as file: file.write(answer+'\n') def find_next_position(position, character): with open(used_table, 'r') as readed_used_table: for row_used_table in readed_used_table: line = row_used_table.strip().split(' ') if position == line[0] and character == line[2]: return True,line[1] # used_table = 'fsa_description.arg' # input_file = 'test.in' # output_file = 'test.out' used_table = sys.argv[1] input_file = sys.argv[2] output_file = sys.argv[3] with open(output_file, 'w') as readed_output_file: with open(input_file, 'r') as readed_input_file: for row_input_file in readed_input_file: result = False next_position = None position = '0' for character in row_input_file: if character =='\n': if position=='0': write_answer('YES') break else: write_answer('NO') break result, next_position = find_next_position(position,character) if result == True: position = next_position