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class Solution:

def getSum(self, a: int, b: int) -> int:

MASK = 0xFFFFFFFF

INT_MAX = 0x7FFFFFFF

# 합, 자릿수 처리

while b != 0:

a, b = (a ^ b) & MASK, ((a & b) << 1) & MASK

# 음수 처리

if a > INT_MAX:

a = ~(a ^ MASK)

return a