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simple queue solution in Clear category for Letter Queue by maksimus
def letter_queue(commands) -> str:
res = ''
for el in commands:
res = res + el[-1:] if "PUSH" in el else res[1:]
return res
if __name__ == '__main__':
print("Example:")
print(letter_queue(['PUSH A',
'POP',
'POP',
'PUSH Z',
'PUSH D',
'PUSH O',
'POP',
'PUSH T']))
# These "asserts" are used for self-checking and not for an auto-testing
assert letter_queue(['PUSH A',
'POP',
'POP',
'PUSH Z',
'PUSH D',
'PUSH O',
'POP',
'PUSH T']) == 'DOT'
assert letter_queue(['POP', 'POP']) == ''
assert letter_queue(['PUSH H', 'PUSH I']) == 'HI'
assert letter_queue([]) == ''
print("Coding complete? Click 'Check' to earn cool rewards!")
Dec. 15, 2020
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