Sum of Two Integers Without Arithmetic Operator || LeetCode Sum of Two Integers 371

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371. Sum of Two Integers. Calculate the sum of two integers a and b, but you are not allowed to use the operator + and -.

Example 1:
Input: a = 1, b = 2
Output: 3

Example 2:
Input: a = -2, b = 3
Output: 1

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[edwardteach]

Finally found a video that explains the XOR and AND operator thoroughly..

[sa]

Very precise and detailed explaination .thanks for the solution 😀

[AkashVerma-worh]

It won't work when both the numbers are equal and of opposite signs. For ex - (-1, 1).
It"ll give runtime error in c++, works fine in Java.

[priyankagupta]

Thanks a lot. Its working perfectly fine!! short and very well explained solution !!

[zameerahmed]

The above code does NOT work if b is -ve and a is > 40 a=50, b=-3

def add(a, b):
if a == 0:return b
if b == 0:return a
axorb=a^b
carry=a&b
if carry == 0:
return axorb
else:
return add(axorb, carry<<1)



print(add(50, -3) )

Recrsion depth Error The code has a strange bug

[dineshkumark]

wow, amazing explained it well. Tysm 😍

[kalashnikov]

Doesn't work for negative integers, since left shift operator on negative integers is not standardized and would give different answers based on compiler.

[namandaga]

Baki sab to sahi hai bas agli baar se muh se paan thuk ke video banana dost :-)