18 lines
513 B
Python
18 lines
513 B
Python
import re
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def check_equation(file_path):
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pattern = r'^\s*(x|[1-9]\d*)\s*[\+\-\*\/]\s*(x|[1-9]\d*)\s*=\s*(x|[1-9]\d*)\s*$'
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with open(file_path, 'r', encoding='utf-8') as file:
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for line in file:
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line = line.strip()
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if re.match(pattern, line):
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if line.count('x') == 1:
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print('yes')
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else:
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print('no')
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else:
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print('no')
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file_path = 'TaskE16/test.in'
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check_equation(file_path) |