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First solution in Clear category for Safe Code by kdim
def safe_code(equation):
digits = [n for n in '0123456789' if n not in equation]
for n in digits:
if n == '0' and ('=#' in equation or equation.startswith('#')):
continue
if eval(equation.replace('#', n).replace('=', '==')):
return int(n)
return -1
if __name__ == '__main__':
print("Example:")
print(safe_code("-5#*-1=5#"))
#These "asserts" using only for self-checking and not necessary for auto-testing
assert safe_code("-5#*-1=5#") == 0
assert safe_code("##*##=302#") == 5
assert safe_code("19--45=5#") == -1
assert safe_code("##--11=11") == -1
assert safe_code("#9+3=22") == 1
assert safe_code("11*#=##") == 2
assert safe_code("#9+3=12") == -1
print("Coding complete? Click 'Check' to earn cool rewards!")
Feb. 6, 2023