28 lines
735 B
Python
28 lines
735 B
Python
#!/usr/bin/env python3
|
|
|
|
lines = (x.strip().replace(" ", "") for x in open("input.txt"))
|
|
|
|
def evaluate(line):
|
|
stack = [0]
|
|
num = 0
|
|
op = ['+']
|
|
for char in line:
|
|
if char in '+*':
|
|
stack[-1] = stack[-1]*num if op[-1] == '*' else stack[-1]+num
|
|
op[-1] = char
|
|
num = 0
|
|
elif char == '(':
|
|
stack.append(0)
|
|
op.append('+')
|
|
elif char == ')':
|
|
stack[-1] = stack[-1]*num if op[-1] == '*' else stack[-1]+num
|
|
num = stack.pop()
|
|
op.pop()
|
|
else:
|
|
num = num*10 + int(char)
|
|
stack[-1] = stack[-1]*num if op[-1] == '*' else stack[-1]+num
|
|
return stack[0]
|
|
|
|
|
|
print(sum(evaluate(line) for line in lines))
|