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First solution in Uncategorized category for Letter Queue by MartynaDziubalka
def letter_queue(commands):
result = []
for x in commands:
if "PUSH" in x:
result.append(x[-1])
if ("POP" in x) and (len(result) != 0):
del result[0]
return ''.join(map(str,result))
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"
Jan. 28, 2016
