QR code
说明
B. QR code
time limit per test
2 secondsmemory limit per test
256 megabytesinput
standard inputoutput
standard output
Input
The input contains two integers a1,a2 (0≤ai≤32), separated by a single space.
Output
Output a single integer.
Examples
Input
1 1
Output
0
Input
3 7
Output
0
Input
13 10
Output
1
样例
