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First solution in Uncategorized category for Digit Stack by Nuszwkartlo
def digit_stack(commands):
stack = ""
sum = 0
for Order in commands:
if "PUSH" in Order:
stack = stack + ',' + Order[5]
continue
if "POP" in Order:
if len(stack) == 0:
continue
sum = sum + int(stack[-1])
if len(stack) == 1:
stack = ""
continue
stack = stack[:-2]
continue
if "PEEK" in Order:
if (len(stack) != 0):
sum = sum + int(stack[-1])
return sum
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"
Jan. 17, 2016
