Enable Javascript in your browser and then refresh this page, for a much enhanced experience.
First solution in Clear category for Letter Queue by Molot
def letter_queue(commands):
res = []
for c in commands:
if c[:4]=='PUSH':
res.append(c.split()[1])
else:
if res: res.pop(0)
return ''.join(res)
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert letter_queue(["PUSH A", "POP", "POP", "PUSH Z", "PUSH D", "PUSH O", "POP", "PUSH T"]) == "DOT", "dot example"
assert letter_queue(["POP", "POP"]) == "", "Pop, Pop, empty"
assert letter_queue(["PUSH H", "PUSH I"]) == "HI", "Hi!"
assert letter_queue([]) == "", "Nothing"
July 15, 2018
Comments: