TESTXOR - Test Xor

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Xor is a binary operation which deal with ones and zeroes.

  • 1 xor 1 is 0
  • 0 xor 0 is 0 too

but

  • 1 xor 0 is 1
  • 0 xor 1 is 1

So we say that xor gives 1 when the arguments are different.

You will read two arguments (1 or 0 each) separated by space, print their xor result.

Input

a b (separated by space)

0 <= a, b <= 1

Output

The result of a xor b.

(Don't print end of line character, just print the result.)

Example

Input:
1 1

Output:
0


Added by:Mostafa 36a2
Date:2013-12-30
Time limit:1s
Source limit:50000B
Memory limit:1536MB
Cluster: Cube (Intel G860)
Languages:All except: ASM64
Resource:Thank you SPOJ