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First solution in Uncategorized category for Digit Stack by marcin-krol
def digit_stack(commands):
stos, res = [], 0
for i in commands:
if i == "POP":
res += stos.pop() if stos else 0
if i == "PEEK":
res += stos[-1] if stos else 0
if i[0:4] == "PUSH":
stos.append(int(i.split(" ")[1]))
return res
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert digit_stack(["PUSH 3", "POP", "POP", "PUSH 4", "PEEK",
"PUSH 9", "PUSH 0", "PEEK", "POP", "PUSH 1", "PEEK"]) == 8, "Example"
assert digit_stack(["POP", "POP"]) == 0, "pop, pop, zero"
assert digit_stack(["PUSH 9", "PUSH 9", "POP"]) == 9, "Push the button"
assert digit_stack([]) == 0, "Nothing"
Dec. 19, 2015
