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First solution in Clear category for Digit Stack by viktor.chyrkin
def digit_stack(commands):
stack, summ = '', 0
for i in commands:
if i == 'POP':
summ += int(stack[-1]) if stack else 0
stack = stack[:-1]
elif i == 'PEEK':
summ += int(stack[-1]) if stack else 0
else:
stack += i[-1]
return summ
Oct. 17, 2021
